No. 1608.] NEW SPECIES OF CRINOIDS—CLARK. O37 
f PSATHYROMETRA PROFUNDORUM, new species. 
Centro-dorsal conical, rather long, 7 mm. long by 4.5 mm. wide, 
divided into radial areas by interradial lines, proximally about half 
as broad as the cirrus sockets, gradually becoming narrow and obso- 
lete distally; 3 columns of cirrus sockets in each radial area, closely 
crowded together, with prominent edges, especially proximally, 6 
cirrus sockets to a column. The calyx and lower part of the arm 
are rather more tuberculous than in the other known species. 
Type.—Cat. No. 22669, U.S.N.M.; from Albatross Station No. 
3342, off Moresby Island, Queen Charlotte group; 1,588 fathoms. 
ZENOMETRA PYRAMIDALIS, new species. 
Centro-dorsal long-conical, about twice as long as its width at the 
proximal end, bearing 5 strong interradial ridges, high proximally, 
becoming gradually lower and finally obsolete distally; cirrus sockets 
in 2 columns of about 6 each, separated by a more or less distinct 
ridge, in each radial area. In other respects this species is similar 
to Z. columnaris, but the spines on the calyx are somewhat more 
numerous and much longer. The pointed centro-dorsal of this 
species makes confusion with Z. columnaris impossible. 
Type.—Cat. No. 22668, U.S.N.M.; from Albatross Station No. 
2415, off Savannah, Georgia; 440 fathoms. 
HIMEROMETRA SUBCARINATA, new species. 
Centro-dorsal thick discoidal, the large bare polar area strongly 
convex, bearing about 40 cirri in two irregular rows; cirri 22 mm. 
long with 33-85 segments, those in the basal half of the cirrus shehtly 
longer than wide, those in the distal half gradually becoming short 
and bearing prominent dorsal spines: radials just visible in the angles 
of the calyx; first costals short and broad; axillaries short, broadly 
pentagonal or almost triangular; the rays, distichals, and first 2 
brachials are in close apposition and are strongly flattened laterally; 
distichals 2, articulated; the costals, distichals, and first 2 brachials 
have a very narrow, delicate, raised median line, giving them a very 
characteristic appearance. Forty arms, 80 mm. long; first 2 brachials 
shghtly wedge-shaped, following 6 discoidal about half as long as 
wide, then becoming quadrate, and almost triangular, soon becoming - 
quadrate again, and almost oblong distally; the third and fourth 
brachials are united by syzygy; the next syzygial pair occurs at from 
the twentieth to the thirty-sixth (usually about the twenty-fifth) ; 
the distal intersyzygial interval is from 5 to 12 (usually about 7) 
brachials; first pinnule slender, stiffened, 7 mm. long, with 15 seg- 
ments, the first 3 squarish and~ strongly carinate, the fourth 
