MOLLUSCA — HEDLEY AND MAY. 125 



genus. An unnamed shell related to the above, but differing by 

 being half the size, faintly radially ribbed, and not so sharply 

 bent over above, was taken in Half-moon Ba3 r , Stewart Island, 

 New Zealand, by Mr. A. Hamilton. 



Venefucardia columnaria, sp.nov. 



(Plate xxv, tigs. 37, 38, 39, 40). 



Shell small, trapezoid-oblong, solid, inflated and inequilateral. 

 The anterior side produced, about twice the length of the posterior. 

 Colour uniform pale yellow. Sculpture: twenty-two low radial 

 ribs parted by narrow grooves ; anteriorly these are few and 

 broad, posteriorly small and crowded. Irregular growth stages 

 segment the ribs, which are aKso traversed by a secondary 

 sculpture of fine concentric hair lines. Lunule lung and narrow. 

 Inner ventral margin with about eighteen small tubercles. 

 Length, 8 ; height, 7 ; depth of single valve, 3 mm. 



A few worn and separate valves. 



CONDYLOCARDIA POKRECTA, Hedlev, 



(Plate xxv., figs. 41, 42). 



AVe were surprised to find as a common .shell off Cape Pillar 

 this* species, described two years ago 11 , from the Capricorn 

 Islands. And we take the opportunity of substituting an 

 excellent drawing by Miss \Y. West for the poor figure which 

 accompanied the original description. To facilitate the deter- 

 mination of this difficult group, we also add a figure (PI. xxv., figs. 

 43, 44, 45) of the related C. peclinala, Tate and May. 



1 ' Hedley— Proc. Linn. Soc. N.S. Wales, xxxi., 1900, p. 4~o, pi. xxxviii., 

 f. 24. 



