134 DR JAMES COSMO MELVILL AND MK ROBERT STANDEN ON THE 



Hab. Deposit No. 38, dredged March 18, 1904, Lit. 71 22' S., long. 16 34' W., 

 1410 fathoms. Station 4 17. 



A small, tumid, smoothish, slightly inequilateral Yoldia, the anterior side 

 rounded, the posterior somewhat produced, to which Y. (Sarepta) abyssicola, Smith,* 

 from Station 246, Challenger Expedition, Mid North Pacific, at 2050 fathoms, and also 

 Station 281, Mid South Pacific, at 2385 fathoms, seems somewhat allied. That species, 

 however, appears more distinctly abbreviate posteriorly, and higher in proportion 

 to its width. Y. ecaudata, Pelseneer,t may likewise be compared, a species which 

 is closely akin to Y. abyssicola. This was obtained during the voyage of the 

 Belgica in the Antarctic region, at a depth of 400-500 metres. Again, Y. Valettei, 

 Lamy, from the South Orkneys, where an example was found in the stomach of a penguin, 

 is much of the same outward form, but less than half the dimensions (2'2 x 1 '65 x 1 "5 mm.), 

 and the teeth are only six in number on either side. The epidermis is likewise named 

 as " fiava" in contradistinction to " plumbea " or " olivacea." 



Nucula pisum, Sowb. 



Nucula pisum, Sowerby, Thes. Conch., iii. p. 153, pi. ccxxix. fig. 133. 

 Hab. Falkland Islands, local, but gregarious. Station 118. 



Order FILIBRANCHIATA. 

 Sub-order AECACEA. 



Family Arcidx. 

 Area (Bathyarca) strebeli, M. and St. 



Area (Bathyarca) strebeli, Melvill and Standen, Trans. Roy. Soc. Edin., vol. xlvi., 

 part i., p. 144, pi. figs. 13, 13<i (1907). 



Hab. Two additional localities can be now given, as follows : 

 Station 420. Dredged at 2620 fathoms. One specimen. 



,, 291. Lat. 67 33' S., long. 36 35' W., 2500 fathoms, March 7, 1903. 



Limopsis lonyipilosa, Pels. 

 Limopsis longipilosa, P. Pelseneer, Voy. du S.Y. "Belgica" : Zoologie, p. 25, figs. 89, 90 (1903). 



Hab. Dredged in lat. 71 22' S., long. 16 34' W., at 1410 fathoms, March 18, 

 1904. Station 417. 



One fairly perfect specimen, probably referable to the above. 



[Very imperfect examples of another Limopsis, solid, small, equilateral, covered 

 with thin, short-bristled epidermis, also occurred at Burdwood Bank, 50 fathoms.] 



* Rep. Challenger Expedition, " Lamellibranchia," pi. xx. figs. 6, 60, 66. 



+ Voy. du S.Y. "Belyica" : Zoologie, par PAUL PELSENEEK, p. 22, figs. 77, 78 (1903). 



(ROY. soc. EDIN. TRANS., VOL. XLVIII., 360.) 



