E C II IX ODE R M A TA. 
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CLASS II.— ECHINODERMATA. 
Order Echinidea (or Sea-urchins). 
Cidaris, Klein. 
*C. metularia, Larack.— The thick-spined Sea-Egg of the 
Island is taken from deep water round the coast. It is found 
also at the Mauritius, the Seychelles, and St. Domingo. There are 
two varieties of this species found at St. Helena. 
Ecliinometra, Breyn. 
*E. acufera, Blainville. — The common thin-spined, black Sea- 
Egg, which abounds on the rocky coast all along the sea-shore just 
below high-water mark. This creature bores a hole in the solid 
basaltic rock sufficiently deep to protect itself. It occurs also at 
Ascension Island, Vera Cruz, Martinique. 
There is a third, a very fine-spined Sea-urchin, the fragments of 
which I have picked up occasionally on the windward sea-coast, but 
I never obtained a complete specimen. 
Order Asteridea (or Star-fishes). 
Asterina, Gray. 
*A. minuta ? — A small greenish Star-fish, found abundantly 
sticking close to the rocks around the sea-coast, about high water 
mark. 
Order Ophitjridea (or Sand-stars). 
Echin aster, Gray. 
*E. sp. ? A bright orange-coloured Sea-star. This brilliant 
creature may often be seen lying at the sea bottom near the slioie, 
at the depth of a fathom or two. 
There are several species of sand-stars, some of them very large 
and taken from deep water. I sent a collection of them to the 
British Museum with the fishes, but as yet they have not been 
examined. 
