MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 355 
Family Buccinde. 
Chrysodomus (Supho) crassicostatus, M. and St. 
Chrysodomus (Sipho) crassicostatus, Melvill and Standen, Trans. ee Soc. Edin., vol. xlvi. 
part i., p. 138, pl. figs. 10, 10a (1907). 
Sipho (1 Mohnia) astrolabiensis, H. Strebel, Schwed. Sudpolar Huped., Band vi., 1, p. 31, 
Taf. iii. fig. 37 a—d (1908). 
One specimen of Svpho astrolabiensis occurred in lat. 63° 9’ S., long. 58° 17’ W., 
at Astrolabe Island. 
From the figure, there can be no doubt of its identity with our S. crassicostatus, 
described the year previously (1907). More examples came to hand from the locality 
already given by us, viz. Scotia Bay, South Orkneys, at 9-10 fathoms, Station 325 ; 
and we have now seen it likewise from Burdwood Bank, at 56 fathoms, Station 346. 
Euthria rosea, Homb. and Jacq. 
Euthria rosea, Hombron et Jacquinot, Voyage au Péle Sud, v. p. 107, tab. xxv. figs. 4, 5. 
3 », Strebel, Mollusk. der Magalhaen. Prov., p. 616, Taf. xxi. figs. 1-4 (1905). 
Hlab.—Burdwood Bank, from Sponge, at 56 fathoms. Station 346. 
Family Ihitride. 
Mitra (Volutomitra) porcellana, sp. n. (Plate, fig. 21). 
M. (V.) testa eleganter fusiformi, nitidissima, candida, porcellana, anfractibus ad 6 (?), apicalibus . . .? 
ceteris nequaquam suturaliter impressis, politissimis, ultimo prolongato, apertura angusté oblonga, labro 
tenui, columella obliquante, quadriplicata, plicis obliquis. 
Long. 14, lat. 6 mm. (sp. imperfecta). 
Hab.—Scotia Bay, South Orkneys, 9-10 fathoms, Station 325 ; also trawl, Burdwood 
Bank, 56 fathoms, Station 346. 
Only two examples of this beautiful, polished white porcellanous shell have as 
yet occurred, one from each locality, widely differimg from other Volutomitre known 
to us; its narrow aperture, obliquely quadriplicate columella, are distinguishing 
characteristics. © Very unfortunately, in neither specimen, owing to breakage, do the 
apical whorls appear, so several points remain for the present a matter of conjecture. 
(e) Toxoglossa. 
Family Conde. 
Bela anderssont, Strebel. 
Bela anderssoni, H. Strebel, Schwed. Sudpolar Exped., p. 14, Taf. ii. fig, 24 a-d (1908). 
Hab.—Station 346, at 56 fathoms, December 1, 1903. 
