chirl, — Seventeen New East Indian Crinoids. 21 



broad, the third one-third to one-half again as long as broad ; the Eourth 

 and fifth arc twice as long as the median diameter; the following seg- 

 ments become slightly shorter so that the third before the penultimate is 

 about one-thin! longer than broad, the next slightly shorter, the ante- 

 penultimate half again as long as broad, and the penultimate very 

 slightly longer than broad. 



The ten arms resemble those of the slender armed variety of C. pur- 

 purea and measure 125 mm. in length. 



The second and third segments of the lower pinnules are very strongly 

 carinatc. 



Type locality.—" Siboga " Station No. 320. 



Cominia australis sp. nov. 



Tins species dillers from C. decameros in having fewer cirri which have 

 fewer segments and are very slightly stouter and less compressed laterally ; 

 the synarthrial and articular tubercles are not so prominent as in 

 C. decameros, but the rugged character is indicated and might become 

 prominent in larger specimens. 



The centrodorsal is thin discoidal, the bare dorsal pole flat, 2 mm. in 

 diameter ; the cirrus sockets are arranged in three closely crowded 

 roughly alternating marginal rows. 



Cirri xxiv, 12-13, 13 mm. to 15 mm. long; the first segment is short, 

 the second nearly or quite twice as broad as long, the third twice as long 

 as the diameter of the ends; the fourth, fifth and sixth are about three 

 times as long as their median diameter ; the following gradually decrease 

 in length so that the antepenultimate is about one-third longer than 

 broad ; the opposing spine is represented by a slight subterminal tubercle; 

 the terminal claw is longer than the penultimate segment, rather stout, 

 and moderately curved; the longer proximal cirrus segments have 

 slightly swollen distal ends, this character gradually disappearing as the 

 segments become shorter; the last four or five segments before the pen- 

 ultimate have the distal dorsal margin very slightly thickened; the cirri 

 are moderately compressed laterally, this increasing slowly and evenly 

 from the base to the short outer segments ; the eighth or ninth segment 

 becomes lighter in color distal ly and is a slightly marked transition seg- 

 ment, though the following segments are, like the preceding, without 

 dorsal processes. 



The post-radial series resemble those of C. decameros, but are not quite 

 so rugged and tubercular. The ten arms were probably about (K) mm. 

 long. 



Type locality.—" Siboga" Station No. 297 



H , 



Comaster sibogae sp. nov. 



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

 that form chiefly in its proportionately longer and much more slender 

 cirri which have proportionately longer proximal segments, and up ire 

 prominent dorsal spines on the distal segments. 



