22 Clark — Seventeen New East Indian Cri voids. 



The cirri arc xxu, 13, 13 nun. long; the first segment is short, the 

 second is twice as long as its median diameter, the third about three 

 times as long as its median diameter, the fourth and fifth the longest, 

 three to three and one-half times as long as the median diameter; the 

 following segments decrease rapidly in length, so that the antepenultimate 

 is slightly longer than broad and the penultimate about as long as broad; 

 the. fifth is a transition segment; the following have small, but sharp and 

 prominent, dorsal spines which are acutely triangular in end view; the 

 opposing spine is subterminal, slender, and very sharp, in height equal 

 to about one-third the lateral diameter of the penultimate segment; the 

 terminal claw is nearly or quite twice as long as the penultimate segment, 

 very slender and moderately curved basally, but becoming nearly straight 

 in the outer two-thirds. 



The arms are about sixty in number, 100 mm. long. 



Type locality.— " Siboga " Station No. 318. 



Comaster pulcher sp. now 



The cirri are XXVII, 15-17, 12 nun. to 15 mm. long; the first segment 

 is about twice as broad as long, the second about twice as long as the 

 expanded distal ends, strongly constricted centrally, the third three or 

 four times as long as the median diameter, constricted centrally, though 

 not so much so as the preceding; the fourth segment is slightly over twice 

 as long as the proximal diameter; the following rapidly decrease in length 

 so that the seventh and following are about as long as broad; the fourth 

 and following have small subterminal dorsal tubercles, and also have the 

 distal edge everted and prominent so that in a lateral view they appear to 

 bear dorsally a broad tubercle with a concave crest. 



The thirty-seven arms are 85 mm. long; one of the n Br series is 2, the 

 remaining nine being 4 (3 + 4); the in Br series are all 2; those which 

 are absent are all external. 



Type locality. — "Siboga" Station No. 257. 



Comantheria weberi sp. nov. 



This new species is most closely related to ('. imbricata ; but it is a 

 more delicate and slender form with more numerous arms and much less 

 robust and smaller cirri. It also lacks entirely on the division series, 

 and almost entirely on the arms, the strong imbrication of the ossicles 

 from which imbricata gets its name. 



The centrodorsal is discoidal, moderately thick, the Hat dorsal pole 4 

 mm. in diameter. 



The cirri are xxxir, 19-20 (usually the latter), about 20 nun. long; the 

 fifth and sixth or sixth and seventh segments are the longest, about half 

 again as long as broad; the outer segments are nearly or quite twice as 

 broad as long; the seventh or eighth (usually the latter) is a transition 

 segment, strongly marked and encircled with a dark band; after the 

 transition segment the distal dorsal edge of the segments begins to pro- 

 ject, forming a serrate transverse ridge which on the outer segments 



