ANNOTATED LIST OF SPECIES. 



THE COMATULIDS. 



i st - Suborder OLIGOPHREATA. 



I. Family Comasteridae A. H. Clark. 



Key to the Subfamilies of the Family Comasteridae. 



a 1 Cirri present 



b 1 the distal cirrus segments bear dorsal processes 



c 1 ten or more arms; if there are more than 10 arms the divi- 

 sion series may be all 2, in which case the first two bra- 

 chials of the outer arms are united by pseudosyzygy and 

 the second and third by syzygy ; or the IIBr series may be 

 4 (3 + 4) and the following series 3 (2 -f 3), in which case 

 the first brachial of the f ree arms (and the first ossicles of 

 the IIIBr and following division series) bears a pinnule, and 

 there is a syzygy between the second and third brachials; 

 in the rare cases in which the division series are very irre- 

 gular the occurrence of a pinnule on the first brachial is 



diagrtostic Capillasterinae 



c" always more than 10 arms fexcept in the very young) ; some 

 or all of the IIBr series 4 (3 + 4); following division series 

 4 (3 + 4) or 2 ; the second brachial of the free arms bears 

 the first pinnule, and there is a syzygy between the third 

 and fourth; in the rare cases in which all the division series 

 are 2 the presence of a synarthry between the first and 

 second brachials and of a syzygy between the third and 

 fourth, and the presence of the first pinnule on the second, 

 are diagnostic Comasterinae 



b 3 all the cirrus segments smooth, without dorsal processes ; rarely 

 more than 10 arms; if there are 10 arms the ossicles of the IBr 

 series and the first two brachials may be united either by synarthry 



SIBOGA-EXPED1TIE XLII /'. 



