100 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



13-15 segments, with rough and spiny distal ends. P 3 is much shorter than P 2 , but 

 rather stout, with 10 or 11 segments. P c is smaller, with only 8 segments. P 4 is 

 the smallest pinnule, much shorter than P 3 . P d is nearly equal to P c . The succeeding 

 pinnules are gradually longer until at the middle of the arm they are 6 mm. long and 

 have about 20 segments. 



The color in life is very variable, ranging from clear lemon yellow or canary 

 yellow with hardly a purple mark through variegated purple and yellow, or varie- 

 gated brown and white, to finely variegated shades of gray and white. Elsewhere 

 Dr. Clark mentioned rather deep maroon and white, and orange-brown and white. 



Of the 7 specimens from the south reef at Mer taken on October 24, 1913 (M. C. Z., 

 595) the largest has the arms 70 mm. long. 



The cotype taken at Mer in October 1913 (M. C. Z., 552) is a very slender speci- 

 men with the cirri and proximal pinnules much more slender than usual, and the 

 dorsal processes on the cirri only faintly indicated. 



The two specimens from Magneto, station XIX are small and dark colored. 



The specimen from Amboina Bay may be described as follows: The centrodorsal 

 is discoidal, rather thin, with the flat dorsal pole studded with small tubercles that 

 decrease in size toward the center. The cirrus sockets are arranged in two irregular 

 alternating rows. 



The cirri are XX, 17-19, about 10-12 mm. long, stout and strongly recurved. 

 The segments are subequal, all broader than long; those beyond the second bear a 

 high and prominent transverse ridge which at first is situated in the proximal half 

 but becomes central distally. There is no production of the distal dorsal edges of the 

 segments. The opposing spine is short, stout, conical, and erect. 



One IIBr 2 series is present. The division series, which have straight edges, 

 are just in contact laterally through narrow flangelike productions of their sides. 



The 11 arms are about 65 mm. long. 



PI is 8 mm. long, evenly tapering from the base to the tip and much stiffened, 

 composed of 12-14 segments of which the first is from half again to twice as broad as 

 long, the second is nearly as long as broad with the sides converging slightly distally, 

 the third is half again as long as broad, the fourth is twice as long as broad or even 

 longer, and those following are longer, increasing in length to the seventh, which is 

 about four times as long as broad, and then decreasing slightly. The last segment 

 is short, conical, and sharply pointed. The outermost five or six segments have the 

 distal edge slightly everted and spinous. P 2 is 11 mm. long, stouter than PI and 

 tapering more gradually but otherwise similar to it, with 15 or 16 segments of which 

 the ninth-eleventh, which are the longest, are about three times as long as broad, 

 and the ninth or tenth and following have the distal edge narrowly everted and 

 finely spinous; the terminal segment is a short sharp conical point. P 3 is about 10 mm. 

 long with 14 or 15 segments and resembles P 2 . P 4 is 6 mm. long with 12 segments and 

 resembles PI, but the outer segments have slightly more prominent distal ends and 

 the terminal portion is more flexible. P is everywhere present and resembles P|. 



Localities. Mer, Murray Islands, Torres Strait; southwest reef; H. L. Clark, 

 1913 [H. L. Clark, 1915, 1921; A. H. Clark, 1918, 1929] (1, M.C.Z., 594 [holotype]). 



Mer, Murray Islands, Torres Strait; south reef; H. L. Clark, October 14, 1913 

 [H. L. Clark, 1915, 1921; A. H. Clark, 1918, 1929] (1, M.C.Z., 597). Same locality, 



