Trochus Australis.—Turbo 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. 
Trocnus AUSTRALIS. 
T. testa conica, granulato-annulata, annulis suturam supereminentibus 
maximis, lutea vel subalbida maculis subrubris et violaceis picta ; anfrac- 
tibus planiusculis ; infima facie planiuscula, imperforata ; fance argentea. 
Habitat ad Nove Hollandiz oras occidentales, ad Insulam Buache. 
Long. poll. 1. Lat. 2. 
Mus. Geovl. Soc. 
This elegant Trochus which approaches in shape to T. conulus, while 
ina 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, profundé umbilicata, transversim creberrimé 
Jamellata, grisea, subtus albida; anfractibus carinatis et suturam versus 
profundé canaliculatis; fauce argentea. 
Habitat ad Nove Hollandiz 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 lamella, and the flattened form of the whorls which 
are carinated on their outward edge and deeply and angnlarly 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 
onthe beach of Garden Island, (Isle Buache;) and on the main land 
