No. 1607. SOME NEW STALKED CRINOIDS— CLARK. 907 
A small fragment of the lower part of a stem from Albatross Sta- 
tion No. 2718, 38° 20’ 00’’ north latitude, 70° 08’ 30°” west longi- 
tude (off the coast of Maryland), 1,859 fathoms, also appears to be- 
long to this form. 
This species is very distinct from any heretofore known from the 
Atlantic; the strongly serrate arms at once differentiate 
it from Bathycrinus carpenterti and B. australis, the 
somewhat convex and not at all constricted radial fun- 
nel separates it from B. aldrichianus, and the broadly 
rounded instead of sharp median ridge on the costals 
from B. gracilis. 
Doctor Doderlein has recently expressed serious 
doubts regarding the possibility of considering Bathy- 
crinus as a genus distinct from Rhizocrinus, a conclu- go Mec gt 
sion a wieucla Jt loach also eicenyecl ims samme mca 
pendently, through a study of material 2‘ 
from other localities than the source of 
his. I am here following him, however, in arbitrarily 
assigning certain species to one genus and others to the 
other, chiefly for the reason that the species in the west- 
ern Atlantic fall sharply into one or other of these gen- 
Tie, Gee, Cll, BrnGl, weal considerably more is known about the 
crinus FevA- intermediate tropical Pacific forms, it would be rather 
TORIALIS; a . 
pasan rtne hasty to reduce Bathycrinus to a synonym of PRhizo- 
AND UPPER crinus. The West Indian species of Bathycrinus, de- 
~__ seribed as B. caribbeus (fig. 2), evidently is much nearer 
Bathycrmus gracilis than to Rhizocrinus lofotensis, in spite of the 
elongate basal ring; but B. equatorialis (fig. 3), from the central Pa- 
cific between the Marquesas Islands and Central America, is, so far as 
can be judged from the stem and basals alone, practically intermediate. 
RHIZOCRINUS VERRILLI, new species. 
1885. Rhizocrinus lofotensis VERRILL, Rep. U. S. Commissioner of Fish and 
Hisheries for 1883) (Pt. XM), p: 551 (part), pl. xxi, fig:.57 (not 
of M. Sars). 
In 1885 Professor Verrill recorded, under the name of Rhizocrinus 
lofotensis, a small Rhizocrinus which had been obtained in 640 fath- 
oms off Marthas Vineyard, Massachusetts. I have recently been 
enabled to reexamine the specimen, and find that it represents a 
species quite distinct from FR. lofotensis, which I propose to call 
LR. verrilli, in recognition of the great services rendered to science, 
particularly in regard to submarine life, by Professor Verrill. 
The species may be described as follows: Basals and radials anchy- 
losed, with no trace of sutures, forming a cup, about half as long 
again as its anterior diameter, with moderately and uniformly convex 
