84 OEIGm OF THE WEST INDIAN ECHINID FAUNA. 
refer for details to the List I have given in the Challenger Keport * of known 
species of Echini, where the bathymetrical, geographical, and geological 
rano;e is e-iven as far as known at that time. To this List should be added 
the deep-sea species collected by the " Gazelle " and described by Studer, 
and the necessary additions and modifications which are suggested in this 
Report. 
The following Table, containing a complete list of all the West Indian 
species of Echini, extended so as to include the few species which thus far 
have not yet been found in the West Indian district, has been prepared, for 
the sake of comparing the West Indian species with the Panamic Echini, 
and with the representative species of Echini found in the American de- 
posits of the Post-Pliocene, Miocene, Eocene, Cretaceous, and Jurassic periods. 
In the column of the principal localities, the present and past geographical 
and geological extension of the genus is given, to allow a ready comparison 
of the actual and former distribution of tlie present West Indian genera to 
be made. The geographical range of each species is also given. AVhen 
several representative species have been described, they have all been 
enumerated. 
* Report on tlie Echinoidea : Report on the Scientific Results of the Voyage of H. M. S. Challenger, 
Pt. IX., p. 208, 1881. 
