23 



segments are slightly constricted centrally vvith expancled ends as is usual in the genus. The 

 dorsal processes on the outer segments are almost obsolete. 



The ten arms, which resemble those of C. parvtila, are between 30 mm. and 35 mm. long. 



The mouth is central or subcentral, the anal tube marginal or submarginal. 



Pj is 7 mm. long and bears a terminal comb consisting of 1 1 long teeth. 



6. Comissia parvula A. H. Clark. 



A. H. Clark. Proc. Biol. Soc. Washington, vol. 25, 191 2, p. 19. 



Stat. 95. 5°43'.5 N., 1 i9°4o' E. 522 Metres. 1 Ex. 

 Stat. 105. 6°8'N., 121 19' E. 275 Metres. 5 Ex. 

 Stat. 294. io°i2'.2S., I24°27'3. E jt, Metres. 2 Ex. 

 Stat. 302. io°27'.9S., I23°28'.7E. 216 Metres. 2 Ex. 

 Label not legible. 1 Ex. 



The centrodorsal is large, discoidal, the dorsal pole flat, 2 mm. to 2.5 mm. in dia- 

 meter; the cirrus sockets are in two marginal rows. 



The cirri are XX — XXIII, 9 — 13 (usually 11), 7 mm. to 9 mm. long, resembling those 

 of C. kispida but slightly more slender. 



The arms are slender, 45 mm. long. 



The specimen from Stat. 95 has the cirri about XX, 11, 7 mm. long; the dorsal pole 

 of the centrodorsal is 2 mm. in -diameter. 



The largest example from Stat. 105 has the cirri XXII, 10 — 11, 7 mm. long; the 

 dorsal pole of the centrodorsal is 2.5 mm. in diameter; the ovaries contain mature, or almost 

 mature, eggs. The four others are very small. 



The specimens from Stat. 294 .have cirri with 10 segments, 6 mm. long; the arms are 

 45 mm. long. 



Those from Stat. 302 have 9 — 11 cirrus segments, and resemble the preceding. 



The individual with the label illegible has the cirri XXIII, 11 — 13, 9 mm. long; the 

 dorsal pole of the centrodorsal is flat, 2 mm. in diameter; ripe eggs are present. The arms 

 are 45 mm. long. 



In addidion to the specimens detailed above I have at hand the following: 



Tawi Tawi group, Philippine Islands, 230 fathoms ("Albatross" Stat. 5162; Cat. N° 36003 

 U. S. National Museum). 



Doworra Island, Moluccas, 205 fathoms ("Albatross" Stat. 5629; Cat. N° 36019 U. S. Natio- 

 nal Museum). 



This species is very close to C. kispida, but is smaller, more delicate, and more slen- 

 der; the cirri, while resembling in structure those of C. kispida, are arranged in two rows 

 instead of in a single row on the centrodorsal, and are more slender and more numerous. 



The very small specimens of the species of this genus may be distinguished from the 

 ten armed young of multibrachiate species by the very short IBr series the elements of which 

 appear to be united by syzygy. 



