MARINE MOLLUSC A OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 129 



Family Bucdnidae. 

 Chrysodomus (Sipho) crossicostatus, M. and St. 



Chrysodotmis (Sipho) crasgirostafu*, i\Ielvill ami Standen, Trans. Roy. Soc. Edin., vol. xlvi. 



part i., p. 13S, pi. figs. 10, 10n (1907). 

 Sipho (\Mohnia) astrolabiensis, H. Strebel, Schwed. Sudpolur 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 34(i. 



Euthria rosea, Homb. and Jacq. 



Euthria rosea, Hombron et Jacquinot, Voyage au Pole Sud, v. p. 107, tab. xxv. figs. 4, 5. 

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



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



Family Mitridse. 

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



M. (V.) testa eleganter fusiformi, nitidissima, Candida, porcellana, anfractibus ad 6 (?), apicalibus . . . 1 

 cgeteris nequaquam suturaliter impressis, politissiniis, ultimo prolongato, apertura anguste oblonga, labro 

 tenui, columella obliquante, quadriplicata, plicis obliquis. 



Long. 14, lat. 6 mm. (sp. imperfecta). 



Hal). 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 Volutomitras known 

 to us ; its narrow aperture, obliquely quadriplicate eolumella, 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 Conidte. 



JBela anderssoni, Strebel. 

 Bela anderssoni, H. Strebel, Schwed. Sudpolar Exped., p. 14, Taf. ii. ti^ r . 24 -</ (190S). 



Hal. Station 346, at 56 fathoms, December 1, 1903. 



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



