A MONOGRAPH OF THE EXISTING CRINOIDS 443 



The arms are about 60 in number, and are 100 mm. in length. 



The terminal comb on the proximal pinnules has 11 or 12 teeth. 



The mouth is subcentral and the anal tube submarginal. 



Locality. Siboga station 318; Java Sea, northeast of Madoera (lat. 6 36' 30" S., 

 long. 114 55' 30" E.); 88 meters; fine yellowish gray mud; February 22, 1900 

 [A. H. Clark, 1918] (1, Amsterdam Mus.). PI. 51, fig. 152. 



Remarks. Comaster sibogae is most nearly related to C.fruticosus, differing from 

 that species chiefly in its proportionately longer and more slender cirri which have 

 relatively longer segments and sharper and more piominent dorsal spines in the 

 distal portion. 



COMASTER SCHONOVI A. H. Clark 

 Plate 64, Figure 179 



Comaster novaeguineae A. H. CLARK, Vidensk. Medd. fra den naturhist. Foreuing i K0bcnhavn, 



1909, p. 141 (east coast of China; description of a specimen). 

 Comaster fruticosus A. H. CLARK, Proc. Biol. Soc. Washington, vol. 26, 1913, p. 178 (range in east 



Asia); Journ. Washington Acad. Sci., vol. 5, No. 6, 1915, p. 214 (part; Malayan species; 



range and its significance). 

 Comaster schonovi A. H. CLARK, Unstalked Crinoids of the Siboga Exped., 1918, p. 36 (in key; 



range); p. 36, footnote 1 (synonymy). 



Diagnostic features. Very similar to fruticosus, but with 12-13 short cirrus seg- 

 ments of which the longest are only half again as long as broad, or at most very 

 slightly longer, instead of three times as long as broad as injruticosus. The ninth or 

 tenth and following segments are broader than long. 



Description. The cirri are XXXIII, 12-13, 12 mm. long. The first segment is 

 short, the second is from one-third to one-half again as long as broad, and the third- 

 fifth are half again as long as broad or rather longer, and somewhat constricted cen- 

 trally. The following segments become shorter, the eighth and ninth being as long 

 as broad and the remainder not so long as broad. The seventh and following seg- 

 ments have slightly everted distal dorsal ends. The opposing spine is small and short, 

 but prominent, scarcely reaching one-third the width of the penultimate segment. 

 The terminal claw is longer than the penultimate segment, stout, and comparatively 

 slightly curved. 



The arms are about 60 in number, 150 mm. long. The brachials are rather 

 strongly overlapping, and the pinnule segments are finely spinous dorsally. 



The general habitus is slender and delicate. 



Localities. East coast of China; Schonau, November 15, 1895 [A. H. Clark, 

 1909, 1913, 1915, 1918] (1, C. M.). 



Singapore (1, C. M.). PI. 64, fig. 179. 



History. As yet only these two specimsns of this interesting species are known. 



COMASTER PULCHER A. H. Clark 



Plate 50, Figures 148, 149 



Comaker pulcher A. H. CLARK, Proc. Biol. Soc. Washington, vol. 25, 1912, p. 22 (description; 

 Siboga station 257) ; Unstalked Crinoids of the Siboga Exped., 1918; p. 37 (in key; range) ; p. 40 

 (references; description; station 257); p. 275 (listed); pi. 14, figs. 14, 15. GISL^N, Kungl. sven- 

 ska Vetenskap. Handl., vol. 59, No. 4, 1919, p. 14 (discussion). 



