530 rROCEEDINGS OF THE NATIONAL MUSEUM. vol. 39. 



Suborder OLIGOPHREATA. 

 Family CO:MASTERIDiE. 



SuTofamily CAFUL-L^STERIISr^. 



Genus CAPILLASTER. 



CAPILLASTER SENTOSA (P. H. Carpenter). 



Station 5355. — One small specimen. 



Station 5481. — One specimen with fifty arms 90 mm. long and cirri 

 XX, 27-35, 25 mm. to 30 mm. (usually 27 mm.) long. 



Station 5482. — One specimen with forty-one arms 120 mm. long 

 and cirri XXI, 27-30 (usually 28) 25 mm. to 30 mm. (usually 27 

 mm.) long. 



Station 5483. — One specimen with thirty -seven arms 110 mm. long 

 and cirri XXVIII, 27-31, 25 mm. to 30 mm. (usually 27 mm.) long. 



CAPILLASTER MULTIRADIATA (Linnaeus). 



Station 5249. — One small specimen. 



Station 5276. — Two specimens, one with thirteen, the other with 

 about twenty arms; the brachials are very short with almost per- 

 fectly straight borders. 



Station 5355. — One small specimen with arms about 70 mm. long; 

 the right anterior radial is axillary, giving rise to two IBr series, one 

 with one IIBr series and three arms, the other with two IIBr series 

 and four arms. The IBr series arising from the axillary radial are 

 spread out laterally exactly as IIBr series diverge from a IBr axillary, 

 so that the anterior and the right posterior rays are much crowded. 

 The left anterior ray is nearly twice the normal size, but of the five 

 arms which it bears only one, which springs undivided from the IIBr 

 axillary, is enlarged; the others, however, have just finished under- 

 going adolescent autotomy and may not have reached their full size. 



Station 5482. — One specimen with about thirty arms. 



Genus COMATELLA. 

 COMATELLA NIGRA (P. H. Carpenter). 



Station 5356. — One specimen with twenty -nine arms 170 mm. long 

 and cirri XXIII, 29-36, 30 mm. to 42 mm. long. The IIBr series bear 

 a IIIBr series externally and an undivided arm internally except in 

 one case where a IIBr series bears merely two undivided arms. 



Station 5413. — One fine specimen with forty arms 170 mm. long 

 and cirri XXI, 30-32, 30 mm. to 33 mm. long. 



In the number of arms and in the arrangement of the arm divisions 

 these specimens resemble typical stelligera instead of typical nigra; 

 but in the structure of the cirri and pinnules and in all other points 



