MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 361 
Sub-order MYTILACEa. 
Family Mytelide. 
Philobrya sublevis, Pels. 
Philobrya sublevis, P. Pelseneer, Voy. du S.Y. “‘ Belgica” : Zoologie, p. 25, figs. 93, 94 (1903). 
Hab.—Station 346, lat. 54° 25’ §., long. 57° 32’ W., at 56 fathoms, January 1, 
1903. 
Philobrya wandelensis, Lamy. 
Philobrya wandelensis, EK. Lamy, Yapéd. Antarct. Frangaise Charcot, 1903-5, p. 16, pl. i. 
figs. 15, 16 (1906). 
Hab.—Trawl, Burdwood Bank, 56 fathoms. Station 346. 
Crenella cdecussata, Mont. 
Mytilus decussatus, Montagu, Test. Brit. Suppl., p. 69 (1309). 
35 5 Forbes and Hanley, i. p. 210, pl. xlv. fig. 2. 
Crenella =A Jeffreys, Brit. Conch., ii. p. 133, V., pl. xxviii. fig. 6. 
- Sowerby, Jil. Index Brit. Shells, pl. vii. fig. 17. 
Hab.—Burdwood Bank, south of the Falkland Islands, at 56 fathoms, December 1, 
1903. Station 346. 
Very minute specimens, not exceeding 2x2 mm., the interior beautifully pale- 
nacreous ; form precisely that of the European and Canadian type, the divaricating 
sculpture seemingly also identical, as well as the fine marginal crenellations. 
Modiolarca mesembrina, M. and St. 
Modiolarca mesembrina, Melvill and Standen, Trans. Roy. Soc. Edin., vol. xlvi., part 1., 
p. 146, pl. figs. 15, 15a (1907). 
Modiolarca picturata, Cooper and Preston, Ann. and Mag. N. Hist., ser. viii, vol. v., pl. iv. 
fig. 5 (1910). 
Hab.—Falkland Islands. Station 118. 
We received lately from Mr A. P. Copp examples of WM. picturata, Cooper and 
Preston, and consider it the same as our mesembrina, from the same locality, described 
three years previously. In marking and coloration it is a most variable species: in 
form it is fairly constant. 
Order HULAMELLIBRANCHIATA. 
Sub-order SUBMYTILACEA. 
Family Carditide. 
Carditella pallida, Sm. 
Carditella pallida, KE. A. Smith, Proc. Zool. Soc. Lond., p. 43, pl. v. figs. 9, 96(1881). 
var. duodecim-costata, nov. (Plate, figs. 19, 19a). 
Hab.—Station 346, Burdwood Bank, at 56 fathoms. Many full-grown specimens, 
but few perfect. 
