280 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



(i. e., IIIBr) series of two ossicles each of which the axillary is "with- 

 out a syzygy," by the absence of lateral processes on the lower 

 pinnules, and by the possession of very stout distichal pinnules 

 (Pd) ; the two species he separated according to the presence (mar- 

 tend) or absence (kraepelini) of a strong eversion of the distal borders 

 of the proximal brachials and the more abrupt (martensi) or more 

 gradual (Tcra&pelini) taper of the proximal pinnules; he remarked 

 that the outer palmar (IIIBr) series of Antedon Icraepelini are often 

 "three jointed, with a syzygy in the axillary" (i. e., 4[3 + 4]). The 

 third species he placed in a new section of the "Savignyi group-" 

 including species in which the inner palmar series are two jointed 

 (i. e., 2) and the outer are thi-ee jointed with a syzygy m the axillary 

 {i. e., 4[3 + 4]); with this new species, which he called Antedon 

 crassipinna, he placed, under the name of Antedon hipartipinna, 

 Craspedometra acuticirra. 



Hartlaub recognized the close relationship between his Antedon 

 martensi and his Antedon Tcraepelini, but though he noticed that the 

 outer pahnars of the latter are often 4(3 + 4) while the inner are 2, 

 the very character upon which he placed most rehance in differen- 

 tiating Antedon crassipinna, he failed to detect the similarity of the 

 two. 



Antedon martensi, described from a small and imperfect specimen 

 from Singapore, is a vaHd species; Antedon hraepelini, described from ' 

 a badly broken specunen from Akyab, Burma, is, so far as I can see 

 after a minute examination of both type specimens, the same as the 

 Actinometra rohustipinna of Carpenter, which Hartlaub had no reason 

 to suspect was in the slightest degree related to it; Antedon crassi- 

 pinna was described from specimens from Amboina, but he includes 

 under this name a specimen from Cochin China, which he studied in 

 the Hamburg Museum; the specimens from Amboina represent the 

 same species as Carpenter's Actinometra rohustipinna, also from the 

 Moluccas, while the specimen from Cochm China, represents a form 

 recently described under the name of Himerometra magnipinna, with 

 the type of which I was able to compare it dhectly. 



In 1894 Bell described, m the "Granulifera group" of Carpenter, a 

 new species from the Macclesfield Bank, which he called Antedon 

 inopinata. Had he referred it to the "Savignyi group," where it 

 belongs, he would have noticed its identity with one or other of the 

 three species described by Hartlaub. It represents the same form as 

 Hartlaub's Antedon kraepelini, and the specimens from Amboina 

 referred to Antedon crassipinna, and also it is the same species as the 

 Actinometra rohustipinna described by Carpenter. 



In 1895 Professor Koehler recorded Antedon crassipinna from the 

 Sunda Islands; while I have not seen his specimens, I have not the 

 slightest doubt that he is right in his identification. His record I 



