MUSEUM OF COMPARATIVE ZOOLOGY. 125 



not allowed us to recognize with confidence. Of Echinida there are 

 five or six species, of which a Oidaris is very abundant, and an Echinus 

 rather common. Both are new species, and the immature specimens 

 found on the coast of Cuba, and referred to Gldaris annulosa and Trip- 

 neustcs ventricosus, in the Bull. Mas. Comp. Zool. No. G, belong in 

 reality to them. The genera Echinocyamus, Amphidetus, and a new 

 genus near Parasalenia, are also represented. The Asleridce arc also 

 represented by several new forms of Opkidiaster, Pterasler, Asterias, 

 and Luidia, and among the Ophiurians of genera near Asteroschema, 

 Asteroporpa, and Astrophyton. The Comatula JIagenii, Pourt., is found 

 in great abundance. The Gorgonians and Corals will be described at the 

 end of this paper. They belong to the following genera: Nephthya, 

 Primnoa, 2 sp. ; Gorgonia, 2 pp. ; Acis, Antipathes, 3 pp. Gcenocya- 

 t/ius, Paracyathus, ThecocyatJins, Rliizotrochus, Lophohdia, Allopora, 

 Distichopora, Errina, Thecopsammia, n. gen. 2 sp. ; Diaseris, Ifaplo- 

 phyllia, n. g. Pliobothrus, n. g. 



It will be remarked that among the Corals the families of Madrepo- 

 ridas and Astrseidae are entirely unrepresented, whilst the greater num- 

 ber belong to the families of Caryophyllidffi and Oculinidae, as defined 

 by Milne-Edwards, or, as we believe, to a new family to be separated 

 from the Oculinida^, and called Stylasteridee. 



The Sponges are found in this region in numerous forms ; they are 

 in general very abundantly provided with siliceous spicula, so much so 

 as to be unpleasant to handle. 



The third and last region is characterized by the great Globigerina 

 deposit. No trace of Vertebrates is found here, the accidental remains 

 being probably soon buried in the soft bottom. But other branches of 

 the animal kingdom are still represented as deep as 517 fathoms, be- 

 yond which limit we had no occasion to dredge. The Crustaceans are 

 confined to a few small and peculiar forms of Pagurians inhabiting shells 

 of Dentalium and Pteropods. Annelids appear to be comparatively 

 abundant and varied. Of living Mollusks only three species were ob- 

 tained, — a Phorus, a Dentalium, and a Limopsis, the two latter more 

 numerously ; and of dead shells, Pleurotoma, Rimula, and Neosra, 

 besides several kinds of Pteropods, not inhabitants of the bottom. The 

 Radiates comprise a few small Ophiurians ; Bourgucticrinus Hotessieri, 

 D'Orb. (which will be described further on) ; Primnoa, Gorgonia, 

 Chrysogorgia, Acanthogorgia, Ms, Mopsea, GaryophyUia, Stephano- 



