NO. 1608.] NEW SPECIES OF CRINOIDS—CLARK. 931 
distally) and much stiffer, with 10 joints, the first not so long as wide, 
the second and third squarish, the following becoming progressively 
elongated; the fourth, fifth, sixth, and proximal half of the seventh 
bear a large genital gland; following pinnules to the seventh or 
eighth similar, but gradually becoming longer and stouter; after the 
ninth the pinnules develop somewhat “ dice-box shaped ” joints with 
prominent distal ends, contrasting more or less with the smoother 
genital pinnules; the distal pinnules are 6 mm, long, the first joint 
short and wedge-shaped, the second about as long as wide, slightly 
trapezoidal, the remainder much elongated with prominent articu- 
lations and protruding distal ends. 
Type—Cat. No. 22678, U.S.N.M.; from Albatross Station No. 
2666; off southern. Georgia; 270 fathoms. 
THAUMATOMETRA PARVA, new species. 
Centro-dorsal rather small, hemispherical or low-conical, the cirrus 
sockets closely set in two or three crowded rows, leaving only a small 
portion of the dorsal pole bare. 
Cirri about 30 in number, 9 mm. long, with 10 to 12 joints; first 
joint squarish, second about half again as long as broad, third and 
fourth between three and four times as long as broad, following joints 
gradually decreasing in length, and gradually becoming broader 
dorso-ventrally and laterally compressed; the antepenultimate joint 
is oblong, about twice as long as broad, and the penultimate is about 
half again as long as broad and bears on its anterior dorsal edge a 
small opposing spine less than one-third of its transverse diameter in 
length, which is directed obliquely forward; the terminal claw is 
about the length of the penultimate joint, rather stout, and moder- 
ately curved; the second to the fifth joints have expanded ends, but 
these die away as the Jjomts become compressed. 
Radials even with the edge of the centro-dorsal; first costals short, 
oblong, about four times as broad as long, somewhat narrower ante- 
riorly than posteriorly, rounded, and well-separated laterally; costal 
axillaries rhombic, somewhat broader than long, the anterior sides 
somewhat curved and the anterior angle rather sharp, with a rounded 
backward projection rising to a slight tubercle. Ten arms, appar- 
ently about 30 mm. long; first brachial wedge-shaped, the outer sides 
longer than the inner, entirely free interiorly; second brachial much 
larger, irregularly quadrate; third and fourth (syzygial pair) some- 
what longer than broad, and slightly longer interiorly than exteriorly ; 
fifth to eighth brachials oblong, about half again as broad as long, 
the joints then becoming wedge-shaped and about as long as broad; 
only the basal third of the arms is present. Syzygia occur between 
the third and fourth, ninth and tenth, ‘and fourteenth and fifteenth 
brachials. 
