GHOGRAPHICAL DISTRIBUTION OF CORALS. 113 
cies In deep water, and none of the Pavonie among the com- 
pound species; but the massive Siderine (Siderastraez) are 
common, and the foliaceous Agaricie and Mycedia. Of the 
Oculina tribe, species of Oculina, Cladocora and Astrangia are 
relatively more numerous than in the central Pacific; but 
there are none of the Pocilliporids, which are common both in 
the torrid and subtorrid regions of the Pacific. Millepores are 
very common. Gorgoniz, are of many species. 
Prof. Verrill observes that not a single West Indian coral 
occurs on the Panama coast, although, on the opposite coast, at 
Aspinwall, there are found nearly all the reef-building species 
of Florida, viz.: Porites astrwoides Lmk., P. clavaria Luwnk., 
Madrepora palmata V.., M. cervicornis L., M. prolifera L., 
Meandrina clivosa V., M. labyrinthica, M. sinuosa Les., with 
other species of Mzandrina, Manicina areolata Ehr., Sider- 
astrea (Siderina) radiata V., S. galaxea Bl., Agaricia agari- 
cites, Orbicella cavernosa V., O. annularis D. Moreover no 
West Indian species is known to be identical with any from 
the Pacific or Indian ocean. 
The reefs of the Brazilian coast south of Cape Roque lie in 
the subtorrid region of oceanic temperature, or between the is- 
ocrymes ot 74° and 68°. The reef corals extend as far south 
as Cape Frio, according to Prot. C. F. Hartt. The species, as 
determined by Prof. Verrill, from Prof. Hartt’s collections, re- 
semble the West Indian. All species of Madrepora, Mzan- 
drina, Diploria, Manicina, Oculina, genera eminently charac- 
teristic of the West Indies, appear to be wanting, while the 
most important reef-making genera are Huvia, Acanthastrea, 
Orbicella, Siderastrea, Porites, and Millepora, and also, of 
less importance, Mussa and some others. A few species, viz. : 
Siderastrea stellata V., Orbicella aperta V., Astrea gravida 
V., and Porites solida V., are very close to West Indian spe- 
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