Mr. Broderip and Mr. G. B. Sowerby on MoUusca. 359 



Art. XLVIII. Observations on new or interesting MoUusca 

 contained, for the most part, in the Museum of the Zoo- 

 logical Society. By W. J. Broderip, Esq., F.R.S., Sec. 

 G.S., ^c, and G. B. SowERsy, F.L,S., ^c. 



Having been requested by the Council to draw up an account of the 

 Mollusca worthy of note, contained in the Museum of the Zoological 

 Society, our attention has been at once arrested by the multitude of new 

 objects, which the zeal of Lieut. Belcher induced him to collect while 

 attached to the expedition under the command of Captain Beechey, and 

 which the Lieutenant liberally presented on his return to the above-named 

 institution. The value and importance of this addition to the museum 

 may be in some degree estimated by the reader when he finds sixty new 

 species recorded in this paper, of which forty-six are in the Society's 

 collection. 



A short description of one of the species, taken from the only speci- 

 men then known, has been given in the supplement to the Catalogue of 

 the Tankerville collection, where it is, not without hesitation, named 

 Turbo bicarinatus. The number collected by Lieut. Belcher, and their 

 fine condition, not only enable us to assign to the animal a place more 

 congenial to its natural characters, but have induced us to establish for it, 

 together with a new cognate species brought home by Captain Parry, the 

 generic appellation of Trichotropis.* With this exception, the whole 

 of the testacea mentioned in this memoir, are, it is believed, cha- 

 racterized for the first time. Those distinguished by an asterisk were 

 brought home by Lieut. Belcher, but do not belong to the museum of 

 the Zoological Society. 



NucuLA Arctica. 



Tab. IX, Fig. 1. 



JV. testd oblongd, postice subrostratd, antich suhrotundatd ; epidermide 



* See p. 373. 



