404 JOURNAL OF CONCHOLOGY. 



situate, it follows at Torbay the anal region, which is not in this 

 case pre-occupied by M. subsiriata; but probably this does not 

 greatly matter, its primary object being to get in the way of a 

 current charged with its sustenance. 



Jeffreys' description of the animal, copied from Alder, must 

 be altered in some respects. Instead of the body being 

 described as 'clear white,' the mantle only is so, but the large 

 foot is pink; and instead of the 'margins being produced con- 

 siderably beyond the shell,' they are very slightly so; the filaments 

 are produced, but the fringed mantle extends very little beyond 

 the margin of the shell — less than one-twentieth of an inch. 



M. ferrugi/wsa is very active, and not at all shy. The foot 

 is large and muscular, and exceeds in length the breadth of the 

 shell. It will sometimes crawl out of the water contained in a 

 saucer, and stay for hours on the sloping side until put back, 

 when it immediately begins crawling again. In travelling the 

 valves gape, the filaments are produced, and the large foot ex- 

 tended its whole length; the filaments are then withdrawn, the 

 valves are partially closed, and the animal pulls itself up, swaying 

 from side to side rather awkwardly — a process very similar to 

 what Clark has described of M. btdentaia. If the sea-water 

 becomes stale and the animals sluggish, a little bubbling of the 

 water rouses them to action again, and they may be kept alive 

 thus for many days if away from the sea-side. 

 ♦•♦-♦ 



Calliostoma (vel Zizyphinus) haliarchus. — Mr. G. B. 



Sowerby thinks this may turn out to be but a larger, thinner, 

 and deep sea form of his Z. jiiaindus, described three or four 

 years ago in P.Z.S. and with which I compared this shell 

 originally and differentiated it by certain characters. Should 

 this opinion turn out eventually to be correct, the whole aggre- 

 gate species must still bear this r\2in\e {Calliostoma haliarchus), 

 since it has been proved by Pilsbry (Man. Conch. Trochidce) that 

 Gould had already on a previous occasion used tlie name 

 jucundian for another species of Calliostoma. As an alternative, 

 Mr. Pilsbry in 1890 proposed for C. Jucundu>n (Sowb.) the name 

 Sowerbyi, but this is however antedated by haliarchus (1888); 

 the generic name, Zizyphinus (Gray) is also antedated by Callio- 

 stoma (Swainson). — J. C. Melvill. 



J.C., vi., Oct., 1891. 



