A MONOGRAPH OF THE EXISTING CRINOIDS 689 



as broad as long. The 10 arms are about 10 mm. long. The arm bases are serrate. 

 The comb of PI is rolled into a tight ball; it consists of a few (probably 5 or G) teeth. 

 P 2) P 3 and P 4 are absent. The disk is 1.3 mm. in diameter. The mouth is central, 

 and is surrounded by orals. 



Locality. East of Chichijima; 146 meters; July 31, 1914. 



Notes. The cirri are XIV, 9, strongly recurved. There is a single IIBr 4 (3+4) 

 series and a single IIIBr 2 series. The 12 arms are 15 mm. long. PI and P 2 , and 

 perhaps P 3 also, have a short comb. The mouth is central. The anal cone is smooth. 

 Gislen says that this is a species either of Comantheria or of Comaster. 



Another specimen has the cirri XII, 8-9, about 2 mm. long. The fourth segment 

 is the longest, three times as long as broad; the fifth and sixth segments are twice as 

 long as broad; the antepenultimate segment is from half again to twice as long as 

 broad. The radials are bandlike, four times as broad as long. The IBr! are three 

 times as broad as long and are free laterally. There are 2 IIBr 4(3 + 4) series. The 

 12 arms are 14 mm. long. P! is 3 mm. long with a comb consisting of 6 high teeth. 

 P 2 and P 3 are usually absent. The comb on P a has 4 teeth. There are no combs on 

 the distal pinnules. The disk is 2 mm. in diameter. The mouth and anal tube are 

 subcentral. The anal funnel is papillated. GislSn suggests that this is probably a 

 species of Comaster. 



In a third specimen the cirri are XII, 9-10, from 2.5 to 4 mm. long. The 10 

 arms, which are 20 mm. long, are somewhat smoother than the arms in the preceding 

 specimen. The comb on PI has 7 teeth, and that on P a has 6 teeth. P 2 and P 3 are 

 wanting. The mouth is a little displaced. The anal cone is strongly papillose. 

 Gisl6n says that this probably represents a species of Comaster. 



In another specimen the cirri are XIV, 8-11, from 2.5 to 4 mm. long. There are 

 2 IIBr 2 series. The comb of PI has 7 teeth. P 2 and P 3 are absent. The anal cone 

 is papillated. 



In a fifth example the cirri are XVII, 10-14, from 3 to 4.5 mm. long. The third 

 and fourth segments are twice as broad as long. The 10 arms are 15 mm. long, of the 

 serrate type. The comb on PI consists of 5 high teeth. P 2 and P 3 are absent. 



A sixth specimen has the cirri IX, 7-9, from 2 to 2.5 mm. long. The 10 arms 

 are 12 mm. long. The comb of PI has about 6 teeth. P 2 and P 3 are absent. The 

 mouth is central. 



In another example the cirri are XVI, 10. The 10 arms are 10 mm. long. P 2 , 

 P 3 , and P 4 are absent. 



In an eighth specimen the cirri are XVII, 8-9. The 10 arms are about 15 mm. 

 long. The comb on P l consists of 9 teeth. P 2 is absent. P 3 is without a comb. 

 The anal tube is smooth. Gislen suggests that this is perhaps a specimen of Comissia 



minuta. 



In another specimen the cirri are XIII, 9-10, 3 mm. long. The 10 arms are all 

 broken. The radials are concealed by the centrodorsal. The comb of PI consists of 

 about 6 teeth. P 2 is rudimentary. 



There are 9 additional specimens from this locality some of which, as determined 

 by Gislen, belong to the subfamily Comasterinae (Comaster and Comantheria) while 



