120 ECHINODERMA OF THE INDIAN MuSEUM, PART VII. 



twenty sharply carinate segments, none of which are longer than broad. Pd 

 and P, are very slender and flagellate after the first few segments. 



The colour in spirits is uniform black, in dry specimens somewhat reddish 

 brown. 



Habitat. — Amboina. 



Depth. — Littoral. 



Remarks. — The above description i.s taken from Hartlaub's account of the 

 type specimetis, which were collected at Amboina by Dr. J Brock ; Hartlaub 

 referred them to C. aeuticirra, but they evidently represent a new species. 



CRASPEDOMETRA ANCEPS. 

 Anledon sp. 1880. P. H. Carpenter, Quart. Journ. Geol. Soc. (February, 1880, 



p. 41 (footnote). 

 Antedon anceps 1888. P. H. Carpenter. " Challenger " Reports, vol. 26, Zoo- 

 logy, p. 254, pi. XXXV, figs. 1-3. 

 Antedon clemens 1888. P. H. Carpenter, " Challenger " Reports, vol. 26, Zoo- 

 logy, p. 229, pi. xxxix, fig. 5. 

 Craspedometra aliena 1909. A. H. Clark, Proc. U. S. Nat. Mus., vol. 37, p. 31. 

 Habitat. — Celebes Sea ; Sunda Islands ; Philippine Islands. 

 Depth. — 10-44 fathoms. 



Remarks. — An examination of the "Challenger" material in London has 

 shown me that my Craspedometra aliena is merely a very large form of the 

 species which Carpenter called anceps, and, furthermore, that his clemens is also 

 the same thing as his anceps. The earlier pinnules of this species sometimes 

 have the curious production of the distal corners of the segments which Carpenter 

 described in Aniphiinelra variipinna and in Oligometra serripinna. 



Genus HETEROMETRA. 

 Heteromelra 1909. A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, p. H 

 (Antedon quinduplicava P. H. Carpenter, 1888). 



HETEROMETRA NEMATODON. 

 Antedon tiematodon 1890. Hartlaub, Nachr. Ges. Gottingen , Mai 1890, p. 185. — 



1891. Nova Acta Acad. German., vol. 58, No. 1, p. 27, pi. i, fig. 9. 

 Helerometra nematodon 1909. A. H. Clark, Proc. Biol. Soc. Washington. 



vol. 22, p. 11. 



Habitat.^— Bowen and Port Molle, Queensland. 



Depth. — Littoral, and down to 20 fathoms. 



Remarks. — At the British Museum I found, in a large jar fuU of specimens 

 of Amphimetra discoidea (labelled Antedon milherti), a small example of this species 

 which had been dredged by the " Alert" at Port Molln in from 12 to 20 fathoms 

 of water. 



