296 REVIEWS AND BOOK NOTICES. 
exploration of the Gulf Stream, by the U. S. Coast Survey. The 
work contains much of general geological and zoological interest 
from the reviews of our. present knowledge of the constitution of 
the sea bottom on the Atlantic coast of the United States, the 
results of which have already been presented to our readers. 
Perhaps the most interesting of the corals figured is the Haplo- 
phyllia paradoxa dredged off Bahia Honda, at the enormous depth 
(for corals) of 324 fathoms.. This remarkable form is referred by 
Count Pourtalés to the Rugose Corals, which have hitherto only 
been found in strata below the Coal measures, and therefore of 
great geological antiquity. The nearest allied form is Caloplyl- 
lum profundum, found fossil in the Dyas. This coral is of 
such interest that we copy the figures. The brief remarks on 
Fig. 100. 
A Deep Sea Coral (Haplophyllia). 
the geographical and bathymetrical distribution of the corals pos 
sess much interest. The reef building species do not seem to er 
tend to any considerable depth. ‘ The families having apparently 
the greatest range in depth, are the Oculinidæ, the Styl 
and the Melleporidæ. Simple corals, which form such a large o 
portion of thè deep sea fauna, are not represented at S ‘wel - 
Floridian reef fauna; some species are describ from the 
Indies, but without indications of depth.” wept 
The author gives a list of dead corals, which have pez nie | 
north of their original habitat by the Gulf Stream. “ Thei 
tions are that a current sweeps over the bottom in 3 adi 1 to 
from south to north : ; in other words, the Gulf Stream @ sh | 
the bottom, at least, as far north as the highest latitude mE 
and is not underlaid by a cold Arctic current running in are se 
site direction, as has sometimes been assumed to ane vit 
low temperature at the bottom.” ‘The work concludes er 
of the corals constituting the Florida reef. The illus 
abundant and excellent. 
