484 BULLETIN 82, UlSriTED STATES NATIONAL MUSEUM VOLUME 1 



to form a rounded tubercle with the IBr2; their edges are more or less fringed with 

 coarse, short, blunt spines which are, however, sometimes almost entirely lacking; 

 these are usually most prominent in the interradial angles. The IBr2 (axillaries) are 

 triangular, about half again as broad as long, with the median part of the posterior 

 border rising into a low rounded tubercle with the IBr,; the borders all around are 

 everted and somewhat prominent. Typically the elements of the IBr scries are in close 

 apposition and more or less flattened against each other laterally, but this feature is 

 not verj' evident in young individuals. 



The 10 arms are from 45 to 50 mm. long. The first brachials are wedge-shaped, 

 about twice as long exteriorly as interiorly, concave distally where they are incised by 

 a posterior projection from the second brachials, which are irregularly quadrate. The 

 fii-st syzygial pair (composed of brachials 3+4) is rather broader than long. The fifth 

 brachial is very slightly wedge-shaped, those following rapidly becoming more so, 

 and after the eleventh being very obhquely quadi'ate, almost triangular, rather longer 

 tlian wide. DistaUy the length of the brachials increases, the terminal being almost 

 oblong and much elongated. 



Syzygics occur between brachials 3+4, 9 + 10 to 14 + 15 (usually nearer the 

 former) and distally at intervals of from 4 to 6 (usually 5) muscular articulations. 



Pi is the longest pinnule, and is somewhat stouter than those following. It is 

 about 4 mm. long and is composed of 8 to 10 segments of which the first is about as 

 long as broad, the second is about half again as long as broad, and those following become 

 progressively elongated. The pinnule tapers evenly from the base to the tip. P2 

 is about 2 mm. long, with 6 or 7 segments, of which the first is about as long as broad, 

 the second is rather longer than broad, and the remainder are elongated. The first 

 two segments are slightly broader than the others. P3 is similar, but slightly shorter. 

 The following pinnules increase in length, and the articulations become rather prominent. 

 The distal pinnules are about 5 mm. long, with about 12 segments, of which the first 

 is not so long as broad, the second is rather longer than broad and somewhat trapezoidal, 

 the tliird is between two and three times as long as broad, and the remainder gradually 

 become more elongated ; the first two segments are slightly broadened, and the articula- 

 tions between those from the third onward are somewhat swoUen. 



Localities. — Albatross station 4900; southwest of the Goto Islands; Ose Saki 

 Light bearing N. 10° E., 8 miles distant Qat. 32°28'50" N., long. 128°34'40" E.); 254 

 meters; temperature 11.61° C; gray sand and broken shells; August 10, 1906 (1, 

 U.S.N.M., 35880). 



Albatross station 4933; Eastern Sea, off Kagoshima Gulf; Sata Misaki Light 

 bearing N. 84° E., 8.5 miles distant (lat. 30°59'00" N., long. 130°29'50" E.); 278 

 meters; temperature 13.33° C; rocky bottom; August 16, 1906 [A. H. Clark, 1907] 

 (1, U.S.N.M., 22663). 



Albatross station 4934; Eastern Sea, off Kagoshima Gulf; Sata Misaki Light 

 bearing N. 77)^° E., 7 miles distant Gat. 30°58'30" N., long. 130°32'00" E.); 188-278 

 meters; rocky bottom; August 16, 1906 [A. H. Clark, 1907] (1, U.S.N.M., 22641). 

 TjTJe locality. 



Albatross station 4965; near Kobe, Japan; Hiro Misaki Light bearing N. 20° W., 

 18.5 miles distant Gat. 33°35'20" N., long. 135°10'50" E.); 349 meters; temperature 

 9.67° C; dark green-gray sand and shells; August 28, 1906 [A. H. Clark, 1907] (3+, 

 U.S.N.M., 22638, 36034, 36191). 



