SYSTEMATIC STUDIES ON SOME MORE NEMATODES FROM THE UNNAMED COLLECTIONS OF THE ZOOLOGICAL SURVEY OF INDIA

While working on the unnamed collections of the Zoological Survey of India, the authors came across some nematodes, which, on examination, have: been found to belong to 18 species of 14 genera of 11 families. The collection is small but interesting as it brings :to light some hitherto unrecorded variations and form new host and locality records. The material is dealt with below. We are thankful to Dr. A. P. Kapur, Director, Zoological Survey of India, Calcutta, for the kind encouragement in the completion of this paper.


INTRODUCTION
While working on the unnamed collections of the Zoological Survey of India, the authors came across some nematodes, which, on examination, have: been found to belong to 18 species of 14 genera of 11 families. The collection is small but interesting as it brings :to light some hitherto unrecorded variations and form new host and locality records. The material is dealt with below.
We are thankful to Dr. A. P. Kapur, Director, Zoological Survey of India, Calcutta, for the kind encouragement in the completion of this paper. SYSTEMA  Material.-Two d' d', Z.S.I. Reg. No. ,V 7036/1, host-pig, locality-Hyderabad (Andhra Pradesh).
~/ale.-Body 5.9 long and 0.31 ,vide; mouth dorso-subterminal and protected ventrally by a pair of falcate struc.tures; buccal capsule 0.15 X 0.12 in diameter and armed basally with a pair of large subventral bicuspid teeth; cervical papillae 0.5 away from anterior end; oesophagus 0.67 long; spicules equal, 0.47 long; gubernaculum 0.099 long; bursa same as described for the species.
Remarks.-The species is here being recorded for the first time from Natrix stolatus.
Remarks.-The present specimens differ from the earlier descriptions in the females being smaller in body size and the spicules being longer.
Female R~marks.- Baylis and Daubney (1923) recorded this species from Nankowry Island of the Nicobar group; thus the ·present record appears to be the first from the Indian mainland., Since so far the species has been recorded among the reptilian hosts from lizards viz., Lacerta sp., its present record from a snake (Enhydris sp.) is thus the first of its kind from snakes.
Th,e species has hitherto been recorded from Siberia (Skrjabin, 1917), and Japan ; and h'e-nce its present record from India greatly extends its range of distri-bU'tion towards the South.
Diplotriaena sp. Remarks.-Though the present specimens show some variations from the earlier descriptions, but due to their poorly preserved state specific identification has not been possible.
The genus is being recorded here for the first time from Andaman Islands. Male.-Body 8.9-9.5 long and 0.22-0.24 wide; three lateral alae present and originating at the level of the junction of pharynx and oesophagus; pharynx 0.12-0.18 X 0.044 in diameter and with 17 -20 annular thickenings; oesophagus 2.2-2.9 long; tail 0.11-0.12 long, rounded and with a small spike; caudal alae asymmetrical, 0.82-1.05 long; longitudinal cuticular ridges present on caudal end; spicules unequal, left 0.99-1.0 and right 0.25-0.27 long; papillae clearly discernible only eight pairs, four pedunculate, preanal and subla'teral in position (postanals not traceable), four sessile, minute, postanal and subventral.
Remarks.-The species forms the first h'ost and locality records.
Male.-Body 3.7-6.6 long and 0.088-0.18 wide; cuticular striations on body nO't prominent excepting in the specimens from Ptyas mucosus where they are prominent just behind the head; buccal vaIves 0.055-0.066 long and 0.066-0.077 wide, '';rods'' 0.033-0.044 long and attached to buccal valves on either side by chitinoid bodies as described by Baylis (1939), they are of different shapes and different shades of yellow, though sometimes much faded due to whicH not clearly discernible; .posterior ring 0.033-0.044 wide; oesophagus divided into two parts, anterior muscular, 0.21-0.27 long, and posterior glandular, 0.27-0.4 long; nerve ring 0.11-0.12 away from anterior end; tail small, 0.088-0.12 long and ,vith caudal alae, Records 01 the Zoological Survey 01 India th'e terminal portion lacking the al'ae and is curved ventrally excepting in specimens from Ptyas mucosus where it is straight; papillae, pedunculate', preanal five pairs, and pos'lanal five pairs, excepting in the specimens from Ptyas mucosus where preanals are eight pairs and postanals nine pairs, the latter divided into four groups of 2: 3 : 3 and 1; spicules unequal and dissimilar, right broad, ala'te and 0.16-0.24 long, left slender, 0.11-0.16 long; accessory piece triangular, 0.022-0.033 long.
Order TRICHURIDEA Yamaguti, 1961Family TRICHURIDAE Railliet, 1915 Trichuris globulosa (v. Linstow, 1901) Ransom, 19111901 Male.-Body with slender oesophageal, and thicker and sh'orter posterior portion, the latter 16.5-22.6 long and 0.53-0.77 wide; spicule 4-7.7 l'ong and 0.055-0.088 thick, thickness increasing near the distal ,end and again narrowing to give a "sabre-like" shape; general characters as also the distal spines on the spicular sheath ,vhich are longer than proximal ones are as described by Baylis (1939) but 'the distal end agrees with Ortlepp (1937) rath,er than Baylis as our specimens (excepting 'thos'e from Axis axis) show no swelling or partially or fully everted sheath showing globular structure.
Female.-Thick part of body 14-19.8 long and 0.88-0.99 wide; vulva 13.8-17.6 away from posterior end-and with spines on irts lips; vagina showing few curves and lined anteriorly heavily with spines (as already given by Baylis), excepting in th,e specimens from chital (Axis axis) which show still fewer curves and sma.ller region with spines.
Remark-s.-The species is being recorded here for the first time from Axis axis.
Female.-Thick part of body 17-20 long and 0.8 wide; vulva 16.5-18.0 away from posterior end and protruded in a tubular form; eggs 0.055 X 0.033 in diameter.
-Though the present specimen shows some variation in the vagina, in the absence of males specific identification is not possible.
Trichuris sp.  Male.-Thick part of body 6.6 long and 0.35 wide; spicule 1.2 long; spicular sheath covered with spines of even length.

Records of the Zoological Survey of India
Remarks.-Though the present specimen shows some variations in the spines on its spicular sheath; in the absence· of females ,ve hesitate to assign it any specific rank.