TRICHOTROPIS.* 



TESTA uiiivalvis, turbinata, carinata, tenuis, 

 apertura longitudinem spirae superante, basi 

 Integra; columella ad basim obliqufe truncata; 

 labio externo tenuissimo, acuto. Epidermis 

 cornea, super carinas testae erinacea. Oper- 

 culum corneum, parvum, lamellis ellipticis 

 confertum, nucleo lateral!. 



A REMARKABLE Getius oT uiilvalve shells, belonging to the 

 predaceoiis Pectinibraiichia, established by Mr. Broderip 

 and mj^self, and first described in the Zoological Journal, 

 from speciinens brought from the vicinity of Icy Cape by 

 Lieut. Belcher in 1828. The animal in most particulars 

 resembles a Bucciniim as to its external form and 

 characters, differing from it principally in having only a 

 very small fold of Ihe mantle to line the nearly obsolete 

 canal of the shell. This and some other inequalities on 

 the edge of the mantle, corresponding in position to the 

 keels on the outside of the shell, constitute the whole of 

 the differences observable between the soft parts of the 

 animal. 



The shell is turbinated and carinated externally; its 

 aperture is wide but longitudinal, and it is rather longer 

 than the spire ; its base is entire, without any notch, but 

 immediately below the obliquely truncated columella there 

 is an indistinct canal . The whole shell is thin and delicate, 

 its outer lip particularly so. Epidermis horny, forming 



From 9pi^ seta, and rpoTrlg carina. 



