MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 129 



Family Buccinidse. 

 Chrysodomus (Sipho) crassicostatus, M. and St. 



Chrysodomus (Sipho) crassicostalus, Melvill and Standen, Trans. Roy. Soe. Edin., vol. xlvi. 



part i., p. 138, pi. figs. 10, 10<i (1907). 

 Sipho (IMohnia) astrolabiensis, H. Strebel, Scluoed. Sudpolar Exped., Band vi., 1, p. 31, 



Taf. iii. fig. 37 a-d (1908). 



One specimen of Sipho 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, Hombrou et Jacquinot, Voyage au Pdle Sud, v. p. 1 07, tab. xxv. figs. 4, 5. 

 ,, Strebel, Mollusk. der Magalhaen. Prov., p. 616, Taf. xxi. figs. 1-4 (1905). 



Hab. Burdwood Bank, from Sponge, at 56 fathoms. Station 346. 



Family Mitridae. 

 Mitra ( Volutomitra) porcellana, sp. n. (Plate, fig. 21). 



M. (V.) testa eleganter fusifoimi, nitidissima, Candida, porcellana, anfractibus ad 6 (?), apicalibus . . . ? 

 caeteris nequaquam suturaliter impressis, politissimis, ultimo prolongato, apertura anguste' 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 differing from other Vulutomitrie 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 Conidse. 



Bela anderssoni, 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. 



(BOY. soc. EDIN. TRANS., VOL. XLVIII., 355.) 



