688 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The disk is 2.5 mm. in diameter and reaches to the first brachial. The mouth is 

 displaced marginally. The anal cone is smooth, 1.2 mm. high, sharply set off with a 

 whorl of papillae around the opening. 



The color is yellow brown. 



UNDETERMINABLE YOUNG COMASTEKIDS 



Locality. — East of the Channel; 146 meters; August 1, 1914. 



Notes.— The cirri are XVIII, 12-17 (usually 15-17), from 4 to 8 mm. long. The 

 opposing spine is a little longer than the dorsal processes on the preceding segments. 



The axillaries are twice as broad as long. There are 2 regenerating IIBr series, 

 of 2 elements each. 



The 12 arms are 30 mm. long. The intersyzygial interval is 3 or 4 muscular 

 articulations. 



Pi is 5.5 mm. long with about 26 segments and a comb of 6-7 teeth. Pj and P3 

 are often very small, only 1 or 2 mm. long. P4 bears a comb. The distal pinnules 

 are 4.5 mm. long with 12-13 segments. 



The disk is 3.5 mm. in diameter. The mouth is marginal. The anal tube is 

 subcentral, slender and papillated, sharply set off from the disk, 2 mm. high. 



Gisl^n says that this specimen differs from the Comatellas described previously 

 in the formation of the disk. 



Locality. — East of Chichijima; 128 meters; broken shells and sand; August 7, 

 1914. 



Notes. — The centrodorsal is 0.8 mm. in diameter. The cirri are XIII, 9-10, 

 from 2.5 to 3 mm. long. The third segment is two and one-quarter times as long 

 as broad. 



The radials, which are partly concealed by the angular centrodorsal, are four 

 times as broad as long. The IBri are twice as broad as long. The IBrj (axillaries) 

 are half again as broad as long, with the distal margins somewhat concave. 



The 10 arms are 15 mm. long. The first brachials are twice as broad as long, no 

 longer exteriorly than interiorly, interiorly united. The second brachials are twice 

 as broad as long, a little longer exteriorly than interiorly. The brachials are long, 

 serrate, and everted. 



Syzygies occur between brachials 3+4 and distally at intervals of 3 muscular 

 articulations. 



The comb on Pi consists of 8 heart-shaped teeth. Pj and P3 are absent. The 

 distal pinnules are 3 mm. long. The disk is 2.2 mm. in diameter. There are inter- 

 radial calcareous plates. The anal funnel is 1 mm. high. 



Locality. — East of the Channel; 146 meters; August 1, 1914. 



Notes. — The cirri are XI, 8-9, from 2.5 to 3 mm. long. The radials are four 

 times as broad as long. The IBri are twice as broad as long. The IBr2 (axillaries) 

 are half again as broad as long. There is 1 IIBr 4 series. There are 11 arms, with 

 very serrate brachials. The comb on P, has 4-5 teeth. Pj is missing. The disk is 

 coarsely granulated with calcareous grains and plates, and small oral plates are present. 

 Gisl6n says that this is probably a young Comaster. 



In another specimen from the same station the cirri are XIII, 10-11, from 2 

 to 2.5 mm. long. The radials are twice as broad as long. The IBr, are half again 



