REPORT ON THE GASTEROPODA. 407 



the snout sometimes distorted to the left, and has (teste Kobelt) an operculum with a terminal nucleus, hut 

 is characterised by a strong tooth on the pillar and a low spire. Murex seemed suggested by the peculi- 

 arity of shape, by the almost total absence of teeth on both lips, and by the length and straightness of the 

 distorted snout, features more or less present in various species, but especially in Murex (ffaustellum) 

 elegans, Beck, Murex (Haustcllum) trilincatus, Reeve. But in all the species of that group the 

 distortion of the snout is, I think, to the right, instead of, as here, to the left. In the end I have 

 followed the advice of Dr Kobelt, feeling his opinion confirmed by the form of the. apex and by the 

 texture of the shell, in both of which points it resembles Nassaria, I am not aware that any species 

 of that genus has been described as having an epidermis ; but, unless there be cases where it is 

 certain that no epidermis exists, its existence may be taken for granted : its absence is often due to 

 remorseless cleaning of specimens for the market. The operculum is somewhat unlike that of 

 Nassaria, and combines the characters of Purpura, Buccinum, and Typhis, though here again ordinary 

 representations are untrustworthy, especially in the case of species whose opercular nucleus is at or 

 near the edge. In these cases the body of the animal gradually separates from the old part of the 

 operculum, which is then apt to be abraded, and thus to present features strangely unlike those of 

 specimens which are young, or which come from deep and quiet water. 



Family Cassid^:, d'Orbigny, 1839. 

 Genera. 1. Cassis, Klein. 2. Oassidaria, Lam. 3. Oniscia, Sow. 



1. Cassis, Klein, 1753. 

 Species. 



1. Cassisl(Semicassis) pila, Reeve. 2. Cassis (Bezoardica) icyvillei, n. sp. 



3. Cassis (Casniaria) turgida, Reeve. 



1. Cassis (Semicassis) pila, Eeeve. 



Martini, Conch. Cab., vol. ii. p. 10, vignette 18, figs. 1, 2. 

 Cassis piila, Reeve, Conch. Icon., vol. v. pi. ix. fig. 21. ^ 



„ Kiister, Conch. Cab. (ed. Kiister), p. 39, sp. 29, pi. Ii. figs. 9, 10. 

 „ „ Lischke, Jap. Meer. Conch, vol. i. p. 63, vol. ii. p. 56. 

 Semicassis pila, Brazier, "Chevert" Exped. Shells, Proc. Linn. Soc. Kew South Wales, vol. i. p. 234. 

 Cassis pila, Dunker, Index MolL Mar. Japon., p. 61. 



April 17-18, 1874. Port Jackson, Sydney. 2 to 10 fathoms. 



Station 188. September 10, 1874. Lat. 9° 59' S., long. 139° 42' E. West of Cape 

 York, off south-west point of Papua. 28 fathoms. Green mud. 



Station 203. October 31, 1874. Lat. 11° 6' N., long. 123° 9' E. Philippines. 

 12 to 20 fathoms. Mud. 



Habitat,— China (British Museum); Torres Straits (Brazier); Japan and China (Lischke). 

 This is a somewhat variable species. Some of the specimens from Station 188 are peculiar. 



