572 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



and much compressed and bearing small and blunt dorsal spines. The opposing spine 

 is not especially large. 



The IIBr and IIIBr series are 4 (3 + 4). The axillaries are long with sharp distal 

 angles. The first segments beyond each axillary are only partly united laterally. 



There are 27 + arms which are probably between 75 and 100 mm. long. The 

 first and second brachials are both bluntly wedge-shaped, the first being the shorter 

 and the second the more nearly oblong. The next 3 brachials are short and nearly 

 oblong. Those following are both longer and broader, wedge-shaped, with overlapping 

 distal ends. After about the fifteenth the width of the brachials decreases and they 

 become more oblong, though still overlapping. 



Syzygies occur between brachials 3 + 4, again from between brachials 11 + 12 to 

 between brachials 15+16, and distally at intervals of 3-5 muscular articulations. 



All of the lower pinnules are long, especially P D , which reaches about 20 mm. in 

 length. Those following diminish gradually in length, that on the sixth brachial 

 being a good deal shorter than its predecessor (P 2 ), though still large. After this the 

 pinnules are stouter and tolerably uniform in length, eventually becoming longer and 

 more slender. The large lower pinnules have sharp keels on the 6 or 7 basal segments. 

 After the fifth or sixth brachials this carination is confined to the first 4 segments, dying 

 away altogether after about the twentieth brachial. The lowest pinnules, as far as 

 the fifth brachials, have terminal combs. 



The disk is 25 mm. in diameter, and is naked. The mouth is interradial. 



I personally examined this specimen in 1910. The numerous cirri are rather 

 strongly curved distally. The dorsal pole of the centrodorsal is very broad. The 

 division series are rather broad, and the axillaries are long and acutely pointed, sug- 

 gesting the conditions found in C. trichoptera. 



Abnormal specimens. In the specimen from Tokyo Bay described by Hartlaub 

 as var. morsei one of the rays carries a IIBr 2 series, and a IIIBr 2 series. 



In the very large specimen from Fukuura (4113) the opposing spine is trans- 

 versely elongate or forked. 



Remarks. Although in most cases individuals of this species are at once dis- 

 tinguishable from examples of the closely related forms, specimens may sometimes be 

 found which intergrade with both C. pinguis and C. solaster. Outside of these 2 

 species its closest relationships are with the south Australian C. trichoptera and its 

 allies. 



Localities. Eastern Asia; Captain Suensson, April 19, 1911 (2, C. M.). 



Albatross station 4895; Eastern Sea, off Kagoshima Gulf; Ose Saki light bearing 

 N. 42 E., 4.7 miles distant Gat. 32 33' 10" N., long. 128 32' 10" E.); 174 meters; 

 green sand, broken shells, and pebbles; August 9, 1906 '(1). 



Albatross station 4894; Eastern Sea, between 10 and 20 miles southwest of the 

 Goto Islands; Ose Saki light bearing N. 41 E., 5 miles distant Gat. 32 33' 00" N., 

 long. 128 32' 10" E.); 171 meters; temperature 13.28 C.; green sand, broken shells, 

 and pebbles; August 9, 1906. 



Albatross station 4890; Eastern Sea, between 10 and 20 miles southwest of the 

 Goto Islands; Ose Said light bearing N. 2 W., 10 miles distant (lat. 32 26' 30" N., 

 long. 128 36' 30" E.); 243 meters; temperature 11.28 C.; rocky bottom; August 9, 

 1906 (1, U. S. N. M., 35162). 



