38 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 40. 



THALASSOMETRA MULTISPINA (P. H. Carpenter). 



Antedon multispina P. H. Carpenter, Challenger Reports, vol. 26, Zoology, 1888, 

 pp. 117, 241, 248, pi. 13, figs. 1-3; pi. 14, figs. 5-7; pi. 69, figs. 1-4. 



Thalassometra multispina A. H. Clark, Smiths. Misc. Coll. (Quarterly Issue), 

 vol. 50, 1907, p. 360. 



Locality.— Near Ascension Island (lat. 7° 54' 20" S.; long. 14° 28' 

 20" W.). 



Depth. — 420 fathoms. 

 Bottom,. — Volcanic sand. 



COSMIOMETRA GARDINERI, new species. 



Description. — This species is most closely related to C. woodmasoni, 

 with the type of which I was able to compare it directly. The cirri 

 are longer and more slender than in that form, 30 mm. long with 

 29-31 segments which are proportionately longer. 



Twenty arms; the carination of the division series is broader than 

 in woodmasoni; the lower brachials have a broad median keel quite 

 different from the faintly indicated crest of woodmasoni; the outer 

 brachials are very strongly overlapping and broadly carinate, the 

 raised portion, when viewed dorsally, having a triangular shape, the 

 apex of the triangle being proximal. The same type of carination is 

 found in woodmasoni, but the triangles are narrower. 



Locality. — Saya de Malha; the type, which is in the British Museum, 

 was collected by the Sea Lark expedition under Prof. J. Stanley 

 Gardiner. 



Depth. — 135 fathoms. 



Subfamily CHAEITOMETRIN^. 

 Genus PACHYLOMETRA A. H. Clark. 



PACHYLOMETRA SCLATERI (Bell). 



Antedon sclateri Bell, Marine Investigations in South Africa, vol. 4, 1905, p. 



140, pi. 3. 

 Pachylometra sclateri A. II. Clark, Proc. Biol. Soc. Washington, vol. 22, 1909, 



p. 20. 



Locality. — East London bearing NW. ^ N., 18 miles distant. 

 Depth.— 250-300 fathoms. 



Suborder MACROPHREATA. 



Family ANTEDONID^. 



Subfamily ANTEDONIN^]. 

 Genus ANTEDON de Freminville. 



ANTEDON BIFIDA (Pennant). 



dEK&Kvsfioc rosacea Linck, De stellis marinis, 1733, p. 55, pi. 37, fig. 66 (based 

 upon the Decempeda cornubiensium of Llhuyd, 1699). 



