504 



DESCRIPTION OF CjECUM AMPUTATUM, AN UNDE- 

 SCRIBED MOLLUSC FROM SYDNEY HARBOUR. 



By C. Hedlky, F.L.S. 



( G oimnunicated hy j^^'^^^i'^ission of the Trustees of the Australian 



Museum.) 



Shell smooth, glossy, opaque, white, short, subcylindrical, slightly 

 bent, near the aperture inflated, then constricted. Lip sharp 

 and everted. Surface microscopically transversely scratched. 

 Mucronal septa well exserted, surrounded by a 

 crown of the truncated tube, apex placed on the 

 side of convex curvature. Length 2, breadth 

 Jmm. 



Hab. — In shell-sand. Cabbage Tree Bay, near 

 Manly, N.S.W. (Brazier) ; Long Bay, near 

 Sydney (Quaife). 



Type in the Australian Museum. 



According to the arrangement followed in 

 Tryon's Monograph of this genus, this species 

 would fall into the section ^^ Levia" The short 

 straighter form of the new species distinguishes 

 it readily from all there enumerated except from 

 the Mediterranean shell C. auriculatum, de Folin, 

 in which a rib is represented surrounding the 

 aperture quite unlike what prevails in C. amputatum. 



The only other Australian species known are those collected by 

 the " Challenger " in Torres Straits. 



