1861.] MR. H. ADAMS ON NEW SPECIES OF SHELLS. 143 



the Museum of Tubingen, and to him I am indebted for the accom- 

 panying fine drawing (PI. XXIV.). 



5. Descriptions of a New Genus and some New Species of 

 Shells from the Collection of Hugh Cuming, Esq. 

 By H. Adams, F.L.S. 



Genus Ocana, H. Adams. 



Operculum casta spirali convexa, granosa instructum ; valde per- 

 foratum ; margine externa simplici. 



Testa turbinata, solida, Icevis, imperforata ; spira brevis, conica ; 

 apertura subcircularis, latior quatn longior ; labium planatum, 

 excavatum, antice subproductum, calla tenui extensa. 



Operculum with a convex, granular spiral rib ; axis deeply per- 

 forated ; outer edge simple. 



Shell turbinate, solid, smooth ; axis imperforate ; spire short, 

 conical ; aperture subcircular, wider than long ; inner lip flattened, 

 excavated, scarcely produced anteriorly, with an extended thin callus. 



Ex. Ocana helicina, H. Adams. 

 Turba helicinus, Born. 

 Turbo cidaris, Gmel. 



When this species was included by my brother and myself in Sar- 

 maticus, to the shells of which genus it bears considerable resem- 

 blance, the operculum was unknown to us. I have, however, recently 

 had an opportunity of examining it, and find it to be entirely different 

 from that of Sarmaticus. It approaches more nearly that of Callo- 

 poma, but it is without submarginal ribs. The species is from the 

 Cape Colony, which is also the locality of the two known species of 

 the former genus. 



Genus Physa, Drap. 

 Subgenus Ameria, H. Adams. 



Testa anfractibus pastice planatis, et angulatis vel carinatis ; 

 spira brevi, depressa. 



Shell with the whorls flattened, and angulated or carinated at the 

 posterior part ; spire short, depressed. 



1. Physa (Ameria) carinata, H.Adams. 



P. testa subovata, tenui, pallida flava-fusca ; spira brevissima, 

 apice planata ; anfractibus 3, pastice planatis et valde cari- 

 natis ; apertura subovali, plica columellari mediacri. 



Shell subovate, thin, pale yellowish-brown ; spire very short, the 

 apex flat ; whorls three, flattened and strongly carinated posteriorly ; 

 aperture subovate, columellar plait moderate. 



Long. 5|, diam. 3^ lin. 



Hab. Boyne River, Australia. 



