NO. 1G97. FIVE NEW UN STALKED CRIN0ID8— CLARK. 31 



Family HIMEROMETRID.E. 



Genus CRASPEDOMETRA A. H. Clark. 



CRASPEDOMETRA ALIENA, new species. 



Centro-dorsal thick-discoidal, the hare polar area flat, 2 mm. to 

 4 mm. in diameter; cirrus sockets arranged in a single or partially 

 double alternating marginal row. 



Cirri XV-XVII, 29-36 (usually 35 or 36), 30 nnn. long, moderately 

 stout basally, but tapering very gradually to a slender tip; first joint 

 short, the following gradually increasing in length to the fourth or 

 fifth, which is squarish, the remainder being slightly longer than 

 broad; the terminal ten to fourteen may have a slight dorsal carina- 

 tion ; opposing spine small but prominent, terminal or subterminal. 

 about equal to one-third the diameter of the penultimate joint in 

 height; terminal claw somewhat longer than the penultimate joint, 

 slender and slightly curved; joints in the distal half or two-thirds of 

 the cirri with purple saddle-shaped markings, as in C. acuticirra. 



Radials entirely concealed in the median line, or equal to half the 

 IBr^ in length; IBr^ oblong, short, five or six times as broad as long, 

 united laterally; IBro (axillary) short, almost or quite triangular, 

 two and one-half to three times as broad as long; ITBr4 (3-|-4:) 

 (twice 2 in one specimen) in apposition and flattened laterally; 

 IIIBr2, but only once present in two specimens, developed internally. 



Fifteen to twenty arms, 140 mm. long, long, slender, and evenly 

 tapering; first two brachials subequal, slightly wedge-shaped, between 

 three and four times as broad as long in the median line; third and 

 fourth brachials (syzygial pair) oblong, two and one-half or three 

 times as broad as long; next five brachials approximately oblong, 

 nearly four times as broad as long in the median line; following 

 brachials triangular, somewhat over twice as broad as long, the longer 

 side somewhat convex, after the proximal fourth of the arm becoming 

 wedge-shaped, about three times as broad as long, and slightly longer 

 terminally. Syzygies occur between the third and fourth brachials, 

 again between the fourteenth and fifteenth to twentj^-ninth and 

 thirtieth, and distally at intervals of from eleven to nineteen oblique 

 muscular articulations. 



Pd small and weak, about 6 mm. long, with thirteen to sixteen joints, 

 all of which are about as long as broad ; P^ similar, slightly larger, 

 T mm. or 8 mm. long; Po 9 mm. to 12 mm. long, with eighteen joints, 

 much stouter and stiffer than the preceding pinnules, ending some- 

 what abruptly with a stiffened tip, as in Stephanometra, and not a 

 long delicate flagellate tip, as in the other species of the genus ; first 

 two joints not so long as broad, the third squarish, the remainder 

 longer than broad, becoming twice as long as broad distally ; the pin- 



