238 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL, XXXIV. 
trapezoidal and somewhat carinate, the remainder elongated; second 
pinnule 11 mm. long, with 20 segments, the first 2 short and carinate, 
the others elongate, about two and a half times as long as broad; 
third and fourth pinnules similar and equal in length, 15 mm. long, 
with 18 to 20 segments, the first 2 as in the second, the others elon- 
gate, three or more times as long as broad; fifth pinnule 8 mm. long, 
most like the first; following pinnules 5 mm. long, small and weak, 
becoming slightly longer distally. The elongate lower pinnules are 
comparatively slender, but stiff and wiry. 
Type.—Cat. No. 22666, U.S.N.M.; from Albatross Station No. 
4880; Sea of Japan; 59 fathoms. August 2, 1906. 
OLIGOMETRA CARIBBEA, new species. 
Centro-dorsal thick-discoidal, with a rather large bare polar are: 
and bearing 2 irregular marginal rows of cirri. 
Cirri about 20 in number, 5 mm. long, with 15 to 17 (usually 15 or 
16) joints; first joint very short, second rather more than half as long 
as broad, the remainder squarish; the second and third joints bear on 
their distal edge a sharp dorsal spine, which after one or two joints 
moves to the middle of the dorsal edge; the opposing spine is rather 
less than the diameter of the penultimate joint in length, and stands: 
out vertically from the middle of the dorsal side; terminal claw not 
quite so long as the penultimate joint, stout, and strongly curved. 
Radials visible, but very short; first costals oblong, about twice as 
broad as long, shghtly concave microns Just in apposition laterally, 
but not laterally flattened; costal axillaries pentagonal, about as long 
as broad. Ten arms, probably about 25 mm. long; first perenne 
wedge-shaped, the longer side out and inwardly united for about the 
proximal two-thirds; second brachial larger, irregular in shape; fol- 
lowing brachials squarish, gradually becoming wedge-shaped, more 
oblique after the twelfth, when they are about as long as wide. 
Syzygia occur between the third and fourth, ninth and tenth, and 
fourteenth and fifteenth brachials, and distally at intervals of three 
bifascial articulations. 
First pinnule 5 mm. long, with 6 joints, the first short, but distally 
produced into a rounded projection, the second rather more than twice 
as long as wide, the remainder greatly elongated; second pinnule 
similar, equally stout basally, but not quite so long; third and fol- 
lowing pinnules 3.5 mm. long, the first two joints short (the first 
somewhat broader than the second), the third, fourth, and fifth some- 
what expanded laterally to protect the genital elands; the distal 
pinnules are lacking. 
Type.—Cat. No. 22676, U.S.N.M.; from Albatross Station No. 2146; 
off Colon, Canal Zone; 34 fathoms. 
