BY C. HEDLEY. 



21 



CuspiDARiA TASMANICA, Ten. Woods. 

 T. Woods, Proc. R. Soc. Tcasmania, 1875, p. 27. 



For comparison with the fore- 

 going species I include illustrations 

 of this hitlierto unfigured species, 

 derived from an authentic specimen 

 kindly lent to me by the Rev. H. 

 D. Atkinson. (Fig. 20). 



Lima brunnea, n.sp. 



(Plate ii., figs. 7-9.) 



Shell thin, translucent, small, 

 shaped like an axehead, with no 

 gape, very inequilateral. Pos- 

 teriorly the shell is truncate for 

 almost the whole height, the trun- 

 cated portion being sharply and 

 CuspiDARiA TASMANICA. deeply infolded. A curve of 



^ig- 20. half a circle is approximately 



described by the ventral and anterior margin. Colour, pale brown. 

 Sculpture : the whole surface is evenly covered by fine, close, 

 radiating riblets, which are microscopically beaded, diverge from 

 a median parting and are occasionally disjointed by concentric 

 growth lines. Cardinal area triangular, overhung by the in- 

 curved beak and sharply defined by a ridge above. Hinge line 

 short. Auricles almost obsolete, cartilage narrow, in an obliquely 

 descending, shallow sulcus, which barely undulates the hinge 

 margin. Inside polished, faintly tinged with purple; the margins 

 denticulated by the radiating riblets. Height, 8 mm.; length, 

 6 mm.; breath of conjoined valves, 4 mm. 



Hah. — Only known within Sydney Heads; dredged alive in 8 

 fathoms off Green Point, Watson's Bay, by Mr. J. Brazier; found 

 dead on Chinaman's Beach, Middle Harbour, by myself, and at 

 the inner South Head by Mr. H. L. Kesteven. 



