570 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The 40 arms are 80 mm. long. The two first brachials are slightly wedge-shaped, 

 about twice as broad as long. The following six brachials are oblong, about twice as 

 broad as long, and those succeeding are obliquely wedge-shaped or almost triangular, 

 much broader than long, gradually becoming wedge-shaped again and oblong distally. 



Syzygies occur between brachials 3+4, again from between brachials 21 + 22 to 

 between brachials 31+32 (usually about brachials 26+27), and distally at intervals 

 of from 5 to 15 muscular articulations. 



P, is 7 mm. long, somewhat stiffened, and is composed of 15-20 segments, of 

 which the first three are about as long as broad and more or less carinate, often 

 strongly so as in the type specimen, the fourth is trapezoidal and somewhat carinate, 

 and the remainder are moderately elongate. P 2 is 11 mm. long, with 20 segments, of 

 which the first three are about as long as broad and carinate, and the remainder are 

 elongate, about two and one-half times as long as broad. P 3 and P 4 are similar to 

 each other and equal in length, 15 mm. long, with 18-20 segments, of which the first 

 two are as in P 2 , and the remainder are three or more times as long as broad. P 2 , 

 although longer than Pj, is about equal to the latter hi general proportions, but P 3 

 and P 4 are stouter and stiffer and stand out prominently from the other pinnules. 

 P 6 is 8 mm. long and is most nearly like PI. The following pinnules are 5 mm. long, 

 small and weak, with 11 comparatively short segments. The distal pinnules are 

 short, 6 mm. long, with about 15 segments, of which the first two are not so long as 

 broad and the remainder are longer than broad, becoming about twice as long as 

 broad distally. 



The type specimen is grayish, with occasional spots of purple on the arms; the 

 dorsal skeleton and the cirri are light grayish tinged with yellow. 



The specimens in the Springer collection, preserved in formalin, are uniform 

 deep purplish brown, the cirri lighter. 



Notes. In the type specimen from Albatross station 4880 the centrodorsal is 

 thick discoidal, with the cirri arranged in two irregular rows. The cirri are about 

 XL, 33-35, the longest 22 mm. long. The longest cirrus segments are slightly longer 

 than broad. The anterolateral angles of the radials are just visible in the inter- 

 radial angles of the calyx. P, is 7 mm. long, with 15 segments. P 2 is 11 mm. long, 

 with 20 segments. P 3 and P 4 are similar and equal in length, 15 mm. long, with 18-20 

 segments. P 6 is 8 mm. long. The elongate lower pinnules are comparatively 

 slender but stiff and wiry. 



In the specimen from Dr. Th. Mortensen's Pacific Expedition station 12 the 

 centrodorsal is 3.2 mm. in diameter, with the bare dorsal pole slightly convex. The 

 cirri are XXXIV, 29-37, from 17 to 19 mm. long. The sixth-fourteenth segments 

 are the longest, and are slightly longer than broad. A dorsal keel is developed from 

 the sixth segment onward. The 37 (? + l broken) arms are 60 mm. long. The divi- 

 sion series are all 2. A single IVBr series is present. A ventrolateral granulation is 

 present from the IBri to the first brachial, and there is a distinct median carination 

 on the division series and the first 8 to 10 brachials. P, is 6.5 mm. long, with 18 

 segments. P 2 is 7.5-9.8 mm. long, with 19-21 segments. P 3 is 12.5 mm. long, with 

 20 segments. P 4 is 13.8 mm. long, with 20 segments. P 6 is 13 mm. long, with 20 

 segments. P 8 is 5.2 mm. long, with 15 segments. The color is violet-red. 



