06 "TERRA NOVA" EXPEDITION. 



conical ; aperture rather round ; peristome thin at the edge, columellar margin slightly 

 thickened and reHexed, united aliove to the outer margin by a thin callus. 



Length, 3'5 mm; diameter, 2. 



Stations 220, 316 : 45-250 fathoms. 



This species differs from R. adarensis, It. glacialis, If. deserta, and some others, 

 by the conical spire and less convex whorls. 



15. Suliliti'it'iHi hnlcr/ii'ti, Thiele. 



Sullafuna indecora, Thiele, Deutsche Siidpolar -Exped., vol. XIII, p. 195, pi. XII, fig. 4, 

 shell ; pi. XV, fig. 19, radula (1912). 



Station 340 : ICO fathoms. 



Two specimens, the largest 4 5 mm. in height, and 4 broad. These shells agree 

 exactly with Thiele 's description, but their penultimate whorl is not quite so high as 

 represented in the figure. Allowing for some variation, this is not of much importance. 

 The operculum is concave above, and consists of about four whorls, separated by a 

 thread-like suture. 



16. (_\tjiiiliiK KnlH'xiiqnr^iiK, Pelseueer. 



Capulus mlicompressm, Pelseneer, Voy. " Belgica," Mollusca (1903), p. 20, pi. V, figs. 52-54; 

 Hedley, Brit. Antarct. Exped. 1907-9, Biol., vol. II, Mollusca, p. 5; Thiele, Deutsche 

 Sudpolar-Exped., vol. XIII, p. 199, pi. XII, figs. 13, H. 



Stations 316, 331, 355 : 190-300 fathoms. 



The figure given by Pelseneer is that of a young shell, as pointed out by Thiele, 

 whose illustration exactly represents the specimens in the present collection. 



17. Marsenlopsis mulli* (Smith). 



Lamellaria mollls, Smith, " Southern Cross " Mollusca, p. 205, pi. XXIV, figs. 19-21 (1902). 



Stations 194, 338 : 180-207 fathoms. 



Seven small specimens of Marseniopsis or allied genera from Stations 314, 340, 

 348, and 355 have still to be determined, but these had better be left to the anatomist 

 for investigation. 



o 



18. Marseniopsis cornea (Smith). 



Lamellaria conica, Smith, " Southern Cross " Mollusca, p. 206, pi. XXIV, fig. 4. 



Station 356, off Granite Harbour, entrance to McMurdo Sound : 50 fathoms. 



The o-enus Jfnrxi'iiiti of Leach has been used bv Bero-h instead of Lamellaria of 



o i/o 



Montagu, on the grounds that Leach limited the first section of Montagu's genus to 

 Oscanius, Leach, and the second to Miu-Kt'iii<t, Leach. The latter author's generic 

 names, however, were not published in 1820, but first appeared in the Ann. Mag. Nat. 



