256 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



In the other specimen from the Kei Islands the long and slender arms are 110 

 mm. in length. The cirri are XXIII, 15-16, 15 mm. long. 



The specimen from Flying-fish Cove is very small. 



Localities. Christmas Island, south of the Sunda Straits, between Sumatra 

 and Java; H. M. S. Flying Fish [A. H. Clark, 1911, 1913] (1, B. M.). 



Flying-fish Cove, Christmas Island; C. W. Andrews [A. H. Clark, 1929] (1. B. M.). 



Danish Expedition to the Kei Islands; Dr. Th. Mortensen; station 24; 100 

 meters; hard bottom; April 15, 1922 (2). PI. 25, figs. 69, 70. 



Remarks. As yet this species is known only from the 4 specimens listed above. 



COMISSIA LJTTORALIS A. H. Clark 



Plate 26, Figures 71, 72 



Comissia littoralis A. H. CLARK, Proc. Biol. Soc. Washington, vol. 25, 1912, p. 18 (description; 

 Siboga station 129, reef) ; Unstalked Crinoids of the Siboga Exped., 1918, p. 19 (in key; range) ; 

 p. 21 (detailed description; with pentacrinoid larvae; station 129); p. 273 (listed); pi. 12, 

 figs. 7, 8. 



Diagnostic features. The cirri are XXI-XXII, 16, 10 mm. or 11 mm. long; the 

 longest cirrus segment is scarcely, if any, more than twice as long as the proximal 

 width. The arms are about 60 mm. long, and are slender. The comb of Pj is 

 composed of 9-11 teeth. P 3 and the following pinnules are without combs. 



Description.- The centrodorsal is very thin, discoidal, with the broad bare 

 dorsal pole flat, from 2.5 mm. to 3 mm. in diameter. The cirrus sockets are arranged 

 in a single crowded and more or less irregular row. 



The cirri are XXI-XXII, 16, from 10 mm. to 11 mm. long. The first segment 

 is short; the second is about twice as broad as long; the third is about half again as 

 long as the proximal width; the fourth is about twice as long as the proximal width, 

 or slightly longer; the fifth is about as long as the fourth, or slightly shorter. The 

 following segments rapidly decrease in length, becoming after the eighth or ninth 

 slightly broader than long. The fifth and following segments have a slight subter- 

 minal dorsal tubercle which gradually moves anteriorly, becoming median after the 

 ninth. The opposing spine is very small, subterminal. The earlier elongate seg- 

 ments are slightly constricted centrally with prominent ends. The distal shorter 

 segments are laterally compressed and therefore appear broad in lateral view. 



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

 of the calyx. Very narrow subradial clefts are present. 



The radials are concealed. The IBri are concealed except in the interradial 

 angles, where their lateral edges diverge at an angle of 90. The IBr 2 (axillaries) 

 are almost triangular, twice as broad as long, with the lateral edges very short and 

 making 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 dorsoventral axis. 



The 10 arms are about 60 mm. long and slender. 



PI is considerably longer and stouter than the succeeding pinnules and bears 

 a comb which consists of from 9 to 11 teeth. P 3 and the following pinnules are 

 without combs. 



