MOLLUSCA 7 



the opposite coast of the continent. The radula has lately been redescribed by 

 Professor Thiele.* 



All the adult specimens have the apex eroded, but the youngest examples show 

 it (Fig. 11) to be dome-shaped and paucispiral. 



The collection contains a quantity of molluscan ova labelled "7-20 fath., 

 June 1908," occurring singly or plastered together in masses. From its size and 

 abundance these can with some confidence be asertbed to N. eatoni. Each capsule 

 (Fig. 12) is a hemispherical orange boss about a third of an inch in diameter and 

 surrounded by a marginal membrane. The ova of Cominella densisculpta, Martens, f 

 seem to be similar. 



Amciuropsis rossiana, Smith 



Smith, Rep. Nat. Antarctic Exped. ; Gast., 1907, p. 5, Plate I., Figs. 6-Ga. 

 Three dead and broken shells from five to twenty fathoms. 



Naticct yrisea, von Martens 



Watson, Rep. ChalL, Zool, XV., 1886, p. 432., Plate XXVIII, Fig. 5 ; Thiele, 

 Deut. Tiefsee Exped., VII., p. 64, Plate VIIL, Fig. 44. 

 Two dead shells from ten to twenty fathoms. 



Lamellaria mollis, Smith 



Smith, Report Coll. Southern Cross, 1902, p. 205, Plate XXIV., Figs. 19-21. 

 Two small specimens from ten to eighty fathoms. 



Trophon shaMetoni, sp. nov. (Plate I., Fig. 13) 



Shell biconical, large, and thin. Colour dead white. Whorls five, and a subulate 

 smooth protoconch, turreted, rather rapidly increasing. Sculpture : broad imbricate 

 thin lamellae, spreading from the base upwards, produced above in hollow curled 

 spouts which crown the whorl, thence continuing to the suture in a low oblique 

 limb. On the last whorl there are from twelve to fourteen lamellae, which continue 

 in a diminishing series up the spire. Interlamellar spaces are scored by fine spiral 

 striae and more conspicuous scratches in the line of growth. Aperture ample, ovate. 

 Canal rather short, screwed to the left, externally with imbricating hoods formed by 

 bases of successive lamellae. Specimen figured, 26 mm. long, 18 mm. broad. A 

 larger example is 33 mm. long and 23 mm. broad. 



Ten specimens, several alive, from seven to twenty fathoms off Cape Royds. 



This appears to be closely related to T. coulmanensis, Smith, \ from which it 



* Thiele, Deut. Tiefsee Exped., VII., p. 1C8, Plate IX., Fig. 57. 



t Martens and Pfeff'er, Jahrb. Hamb. wiss. Anstal. III., 188C, p. 73, Plate I., Fig. P.. 



+ Smith, Discovery, Moll., p. 2, Plate I., Figs. 4-46. 



