2 I 



cirrus segments are very slightly less elongate than in the type specimen, but I can find no 

 other differences. 



3. Comissia littoralis A. H. Clark. 



A. H. CLARK. Proc. Biol. Soc. Washington, vol. 25, 1912, p. 18. 



Stat. 129. Anchorage oft" Kavvio and Kamboling Islands, Karkaralong group. Reef. 2 Ex. 



The centrodorsal is very thin, discoidal, the broad dorsal pole fiat, 2.5 mm. to 3.0 

 mm. in diameter; the cirrus sockets are arranged in a single crowded and more or less irre- 

 gular marginal row. 



The cirri are XXI — XXII, 16, 10 mm. to 11 mm. long; the first segment is short, 

 the second about twice as broad as long, the third about half again as long as the proximal 

 diameter, the fourth about twice as long as the proximal diameter or slightly longer, the fifth 

 about as long as the fourth or slightly shorter ; the following rapidly decrease in length, beco- 

 ming after the eighth or ninth slightly broader than long; the fifth and following have a slight 

 subterminal dorsal tubercle which gradually moves anteriorly, becoming median after the ninth; 

 the opposing spine is very small, subterminal. The earlier longer segments are slightly con- 

 stricted centrally with prominent ends ; the distal shorter segments are laterally compressed 

 and therefore appear broad. 



The ends of the basal rays are visible as small tubercles in the angles of the calyx; 

 very narrow subradial clefts are present; the radials are concealed ; the IB^ are concealed 

 except in the angles of the calyx where their lateral edges diverge at an angle of 90 ; the 

 axillaries are almost triangular, twice as broad as long; the lateral edges are very short, ma- 

 king an obtuse angle with those of the IBr,. The division series and arm bases, which are 

 quite without synarthrial or articular tubercles, extend outward at right angles to the dorso- 

 ventral axis ; this, with the broad flat centrodorsal carrying a single row of cirri, gives the 

 animal a singularly fiattened habitus in contrast to peregrina and lütkeni in which the division 

 series and arm bases make a slight angle with the plane perpendicular to the dorsoventral 

 axis. In this respect C. hispida is intermediate between littoralis, and peregrina and lütkeni. 



The ten arms are about 60 mm. long, and slender. 



F l is considerably longer and stouter than the succeeding pinnules, and bears a comb 

 with 9 — 11 teeth ; P„ and the following pinnules are without combs. 



Seven pentacrinoid larvae were attached to the cirri of these two specimens. 



4. Comissia spinosissima A. H. Clark. 



A. H. CLARK. Proc. Biol. Soc. Washington, vol. 25, 19 12, p. 20. 



Stat. 305. Mid-channel in Solor Strait, oft" Kampong Menanga. 113 Metres. 2 Ex. 



The centrodorsal is large, thin discoidal, the dorsal pole fiat, regularly pentagonal, 2 

 mm. in diameter. 



The cirri are XXX, 10 — 11, 8 mm. long, small and slender, with the distal edges of 



