OcT., “1907. New Crinoips — SLocom. 297 
‘a row of three or more plates, gradually diminishing in size; these 
anal plates are similar in size to the corresponding radial, costal and 
distichal plates; on either side of the anal plates is a series of plates 
similar to, but slightly smaller than, those of the interbrachial areas, 
with the exception that there are three in the third row instead 
of two. 
This species somewhat resembles H. benedict S. A. M. in general 
appearance, but it is distinguished from that species by having a more 
shallow and expanded basalcup. The diameter of the calyx is greater 
_in proportion to its height in H. farringtoni than in H. benedicti, and 
both the constriction below the arm bases and the second and third 
distichals are wanting in H. farringtont. In the form of the calyx 
and the ornamentation of the plates H. farringtont resembles H. lemon- 
tensis, but they are distinguished by the shape of their first costals 
and by the number and shape of the plates in the interbrachial areas. 
The type specimen of H. farringtont, on which this description is 
based, consists of a natural cast of the dorsal cup accompanied by a 
portion of the natural mold. The sutures are well defined on both 
cast and mold. The mold comprises two rays, one interbrachial 
area and more than half the anal interradius. An impression taken 
from this mold gives the external form of the calyx and the surface 
markings of the plates. As the basal plates are missing from this mold, 
the impression of a mold in the collection of the University of Chicago 
is also figured, Plate LXX XVII, Figs.1 and2. The type is somewhat 
crushed, thus giving a wider appearance in BEBO On to its height 
than is natural. 
The specific name is proposed in honor of Dr. O. C. Farrington, 
Curator of the Department of Geology of the Museum. 
Locality: This species is represented in the Museum collections by 
the type specimen P 8474, and a natural cast, P 8949. These were 
collected by the writer in the Niagaran limestone of the spoil heaps 
along the Chicago Drainage Canal about a mile east of Lemont, Illinois, 
one in the fall of 1905 and one in the spring of 1906. The specimen 
in the collection of the University of Chicago is from the same 
locality. 
HABROCRINUS LEMONTENSIS sp. nov. Plate LXXXVII, Figs. 8-10. 
The calyx is urn-shaped with an expanded hexagonal base; mod- 
erately constricted between the prominent arm bases, giving a pentag- 
onal section to the dorsal cup. The dome is not preserved. The 
plates of the dorsal cup are thick and depressed with nodes near the 
angles of the plates. Thesutures are situated in deep furrows formed 
