L 
I 
40 ECHIXOCYAMUS PUSILLUS. 
Toxopneustes variegatus A. Ac. 
Yucatan Bank, Florida, Lesser Antilles. Lat. 32° 25' N., Long. 77° 42' 30" W. 14-300 fathoms. 
For list of Stations, see Bull. M. C. Z., VIIL, No. 2, p. 78, 1880. 
Hipponoe esculenta A. Ag. 
Yucatan Bank, Cuba, Florida, Lesser Antilles. 14-451 fathoms. 
For list of Stations, see Bull. M. C. Z., YIIL, No. 2, p. 78, 1880. 
Echinocyamus pusillus Van Ph. 
Florida Bank, Florida, Cuba, Lesser Antilles. 98-805 fathoms ; most abundant between 150 and 
400 fathoms. " 
For list of Stations, see Bull. M. C. Z., V., No. 9, p. 189, 1878 ; VIIL, No. 2, p. 78, 1880. 
An immense number of dead tests of tins species were dredged in the 
Caribbean, the Gulf of Mexico, and the Straits of Florida. It has not yet 
been found to the northward of the Straits of Bemini. The number of 
living specimens brought up is small. It is interesting to note, in this 
connection, that the dead tests of species of Clypeaster, of Echinanthus, 
of Encope, of Schizaster, of Macropneustes, of Agassizia, of Echinolampas, 
of Linopneustes, of Toxopneustes, of Trigonocidaris, of Temnechinus, of 
Salenia, and of Cidaris, were also frequently dredged, and sometimes in 
considerable numbers. This has an important bearing as indicating the 
species which are likely hereafter to be preserved as fossils, and shows us 
how difficult it may become, even when we have such an abundant and 
characteristic Echinid fauna as that of the West Indies, to reconstruct it 
from the future fossils. It is also intei'esting to note that the genera 
(except Echinocyamus) of which we so frequently find the dead tests are 
the same which have been known as characteristic of the West Indies 
since the earliest tertiary. Evidently, except under the most favorable 
circumstances, we cannot expect to find represented as fossils the Echino- 
thurite, PourtalesijB, and many of the EchinidiB, which after death readily 
fall to pieces, and may be dissolved by the excess of carbonic acid at 
great depth before they become protected by a covering of deep-sea 
ooze. 
