Summary
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1.
The full development ofSalmacis bicolor, a tropical form has been traced both in regard to the external characters and several internal features.
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2.
The amnion has been shown to arise very early in development.
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3.
The development of the larval skeleton has been traced.
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4.
The metamorphosis and the post-larval stages have been described.
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5.
The absence of sexual periodicity inSalmacis bicolor has been proved.
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Abbreviations
- a.cil.ep. :
-
Anterior ciliated epaulette
- a.l.a. :
-
Antero-lateral arms
- a.l.r. :
-
Antero-lateral rod
- a.œ.s :
-
Adult œsophagus
- ad. stom. :
-
Adult stomodæum
- am. :
-
Amnion
- am.c. :
-
Amniotic cavity
- am.f. :
-
Amniotic fold
- amp. :
-
Ampulla
- arch. :
-
Archenteron
- a.z.t. :
-
Azygos tube foot
- b.r. :
-
Body rod
- cœ. :
-
Cœlom
- d. :
-
Tooth
- d.a. :
-
Dorsal arch
- d.s. :
-
Dental sac
- d.t.r. :
-
Dorsal transverse rod
- ep.c. :
-
Epineural cavity
- ep.f. :
-
Epineural fold
- hy. :
-
Hydrocœl
- int. :
-
Intestine.
- in. sp. :
-
Inferior spiral
- ip. mus. :
-
Interpyramidal muscle
- l.a.c. :
-
Left anterior cœlom
- l.hy. :
-
Left hydrocœl
- l.œs. :
-
Larval œsophagus
- l.p.c. :
-
Left posterior cœlom
- mes. :
-
Mesenchyme
- m.p. :
-
Primary water pore
- musc. :
-
Muscles
- nerve. :
-
Nerve fibrils
- o.sp. :
-
Ordinary spicule
- p.c. :
-
Pore canal
- p.sp. :
-
Primary spicule
- p.d.r. :
-
Postero-dorsal rod
- ped. :
-
Pedicellaria
- pig. :
-
Pigment
- p.l.p. :
-
Postero-lateral processes
- p.o.a. :
-
Post-oral arm
- pr.o.a. :
-
Pre-oral arm
- q.sp. :
-
Quadrangular spine
- r.a.c. :
-
Right anterior cœlom
- r.nerv. :
-
Radial nerve
- r.p.c. :
-
Right posterior cœolom
- r.r. :
-
Recurrent rod
- sp. :
-
Spine.
- su. sp. :
-
Superior spiral
- st. :
-
Stomach
- st.c. :
-
Stone canal
- t.f. :
-
Tube feet
- v.t.r. :
-
Ventral transverse rod
- w.v.r. :
-
Water vascular ring
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Aiyar, R.G. Early development and metamorphosis of the tropical echinoidSalmacis bicolor, agassiz. Proc. Indian Acad. Sci. 1, 714–728 (1935). https://doi.org/10.1007/BF03050571
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DOI: https://doi.org/10.1007/BF03050571