94 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



PD is 15 mm. long, large and stout in the basal half but tapering to a slender tip, 

 composed of about 25 segments of which the second-seventh are broader than long 

 and the remainder are about as long as broad. PI is 12 mm. long with 23 segments, 

 much less stout than P D , with the distal segments somewhat spinous along the dorsal 

 ridge. PS is 7 mm. long, considerably more slender than P 2 , tapering evenly from the 

 base to the end of the proximal half, slender in the distal half, composed of 16 segments 

 all but the first two of which are about as long as broad. The following pinnules are of 

 about the same length but scarcely taper at all until near the tip and hence appear 

 somewhat stouter; they are composed of about 14 segments. The distal pinnules are 

 moderately slender, 12 mm. long with 20 segments of which the first is trapezoidal, 

 about twice as broad distally as the median length, the second is trapezoidal, somewhat 

 broader distally than the median length, and the remainder are slightly longer than 

 broad; the dorsal ridge is very sharp and more or less spinous. 



The color in alcohol is white. 



Notes. The preceding description is based upon the type specimen in the Indian 

 Museum at Calcutta from the Malay Archipelago in 30 fathoms. 



The specimen from Albatross station 5317 was described as a new species, 

 Crotalometra infelix, in the following terms. The centrodorsal is low-conical with the 

 apex abruptly prolonged. The cirrus sockets are arranged in 10 closely crowded 

 columns. 



The cirri are XX, 38-44, from 25 to 30 mm. long. The first segment is short and 

 those following gradually increase in length becoming about as long as broad on the 

 fifth and half again as long as broad on the seventh. The segments following gradually 

 decrease in length becoming about as long as broad on the eleventh and from half again 

 to twice as broad as long distally. The eighth and following segments have produced 

 distal dorsal edges which soon become prominent dorsal spines. 



The ends of the basal rays are visible in the interradial angles of the calyx as 

 dorsoventrally elongate tubercles. 



The radials are short, about four times as broad as long, with a prominent median 

 tubercle. The IBr] are broader proximally than distally, and about twice as broad 

 distally as long in the mid-dorsal line ; they bear a low broadly rounded median carina- 

 tion which is most prominent posteriorly. The IBr 2 (axillaries) are rhombic, half 

 again as broad as long; the proximal two-thirds of the median dorsal line is raised into 

 a low broad tubercle. The IIBr series are 4(3+4). 



The 13 arms are 90 mm. long. After the proximal third the brachials gradually 

 develop produced and overlapping spinous distal edges, at the same tune becoming 

 laterally compressed. After the proximal half this production of the distal edge becomes 

 very prominent, especially in the median line. 



I said that this species is nearest to C. sentijera, but the centrodorsal is propor- 

 tionately much smaller and bears closely crowded columns of cirrus sockets without 

 bare midradial areas, the edges of the elements of the IBr series are smooth instead of 

 finely dentate, the IB^ has a distinct, though low, rounded median carination, and the 

 distal overlap of the brachials, though very prominent, is not produced into the long 

 overlapping spine characteristic of C. sentijera. I added that the type of C. infelix is 

 a small specimen and that larger specimens may prove to approach C. sentijera, "though 

 it seems most probable that the two forms are quite distinct." 



