934 PROCEEDINGS OF THE NATIONAL MUSEUM. “VOL, XXXIV. 
of very fine spines, the dorsal surface granulose; second brachial ir- 
regular in shape, with a strong rounded posterior projection; third 
and fourth brachials (syzygial pair) about half again as long as 
broad; following joints rather longer than broad, gradually becom- 
ing more elongate, in the outer part of the arm reaching a length of 
about three times their width; the brachials are all remarkable for 
their strongly concave surface, which makes them all strongly “ dice- 
box shaped ” with large and expanded ends, which, from the sixth 
brachial onward, bear a fringe of rather large spines. Syzygia occur 
between the third and fourth brachials, again between the ninth and 
tenth and fourteenth and fifteenth, and distally at intervals of two 
bifascial articulations (1. e., “in alternate joints”). 
First pinnule very slender and filiform; first 3 joints about as long 
as broad, strongly concave dorsally with prominent ends, then becom- 
ing rapidly elongated with broadly flaring distal ends; the tip of 
the pinnule is broken; the third and following pinnules bear on the 
fifth to the seventh joints (which are slender and much elongated) 
large genital glands; the distal pinnules are exceedingly slender, 
the first joint nearly as long as broad, the second about twice as long 
as broad, wider proximally than distally, the remainder very slender 
and greatly elongated, with expanded ends. 
Bathymetra minutissima 1s scarcely half the size of the other three 
species of the genus, from all of which the presence of broad spinous 
borders on the costals and the prominent spinous overlaps of the 
brachials at once distinguish it. 
Type.—Cat. No. 22671, U.S.N.M.; from Albatross Station No. 
9761, east of the Abrolhos Islands, off the Brazilian coast; 818 
fathoms. 
BATHYMETRA BREVICIRRA, new species. 
Centro-dorsal hemispherical, rather low, bearing about 45 cirrus 
sockets in 8 crowded columns of 3 each in each radial area. 
Cirri 380 to 40, 6 mm. long, with 14 joints; first joint rather less 
than half as long as broad, second joint rather longer than broad, 
sometimes squarish, third joint rather more than twice as long as its 
proximal diameter, centrally constricted with expanded ends, fourth 
joint about three times as long as its proximal diameter, also strongly 
“ dice-box shaped; ” following joints decreasing gradually in length, 
the proximal ends becoming less and the distal rather more expanded, 
the antepenultimate joint being about twice as long as the diameter 
of its proximal end, the penultimate rather shorter, with an opposing 
spine which is not so long as the diameter of the joint, arising from 
its distal half; terminal claw short, conical, slightly curved, from 
one-half to three-quarters the length of the penultimate joint. 
Radials short, strongly concave anteriorly, and produced in the 
interradial angles of the calyx, but not separating the first costals; 
