Trochus Aastralis. — Turho lamellosus. 331 



colouring is brought into view, shewing the appearance which the shell 

 would present in its youth, and before the secretion of the last coat which 

 marks the adult state. 



It is hoped that the figures and description here given, may, as the 

 locality is known, be the means of drawing the attention of those who 

 may have it in their power to procure finer specimens. When a dead 

 shell is found on a beach, an accurate search at low water under stones, 

 rolled madrepores, &c. or in pools left by the retiring tide is often rewarded 

 with the discovery of the living mollusc ; and if success should not 

 attend such efforts, the dredge will be rarely found to fail. 



Trochus Australis. 

 T. testa conica, granulato-annulata, annulis suturam supereminentibus 

 maximis, lutea vel subalbida maculis subrubris et violaceis picta ; anfrac- 

 tibus planiuscuhs ; infima facie planiuscula, imperforata ; fauce argentea. 

 Habitat ad Novae HoUandiae oras occidentales, ad Insulam Buache. 

 Long. poll. 1. Lat. ^. 

 Mus. Geol. Soc. 



This elegant Trochus which approaches in shape to T. conulus, while 

 in a part of its colouring it reminds the observer of T. annulatus, and has 

 somewhat the aspect of T. Zizyphinus, was found on the beach of Garden 

 Island, (Isle Buache) by Archdeacon Scott, and was presented by him to 

 the Geological Society. 



Turbo lamellosus. 

 T. testa orbiculato-depressa, profunde umbilicata, transversim creberrime 

 lamellata, grisea, sublus albida; anfractibus carinatis et suturam versus 

 profunde canaliculatis ; fauce argentea. 



Habitat ad Novse HoUandise oras occidentales, ad Insulam Buache. 

 Mus. Geol. Soc, nost., &c. 



This shell varies much in its different stages of growth. It approaches 

 nearest to Turbo torquatus, but differs from that species in the depth 

 and sharpness of its lamellae, and the flattened form of the whorls v^^hich 

 are carinated on their outward edge and deeply and angularly channelled 

 towards the suture. The young shells are much more flat than those of 

 advanced growth, they are dashed with darkish stripes along the upper side 

 of the whorl which terminate at the edge of the carina, and are mottled with 

 the same colour on the under side. Archdeacon Scott found his specimens 

 on the beach of Garden Island, (Isle Buache;) and on the main land 



