and more distant on the posterior side. Elongate-oval, very 

 inequilateral, a little convex ; posteriorly narrow, rounded ; 

 anteriorly produced, acuminately rounded ; post-dorsal slope 

 very oblique, slightly concave behind the small acute umbo, 

 thence a little ecurved to the rounded posterior margin ; the 

 antero-dorsal slope is very much longer, nearly straight. 

 Eight valve with two cardinal teeth, the posterior larger, 

 triangular, and bifid ; laterals well developed. Left valve with 

 one bifid cardinal tooth only(?). 



Dimensions. — Antero-posterior diameter, 9 ; umbo-ventral 

 diameter, 5 '5 millimetres. 



Locality. — Dead shells from 22 fathoms in Encounter Bay. 



This neat little species bears considerable resemblance to 

 T. diluta, Smith, in Voy. Challenger, but is much shorter pos- 

 teriorly, and otherwise a little different in outline, as also in 

 sculpture. 



Tellina Aldingensis, spec. nov. Plate v., fig. 2. 



Right valve transversely elongate, subdepressed, much in- 

 equilateral ; the anterior side larger than the posterior, rounded 

 at the extremity and scarcely narrowed ; posterior considerably 

 attenuated, and narrowly truncated and inconspicuously bi- 

 angulate at the extremity. The carination of the posterior 

 slope is broadly and flatly convex, in front of which the shell 

 is slightly depressed, but corresponding therewith on the in- 

 terior there is a conspicuous, white, narrow ridge. Colour 

 yellowish-white. The sculpture consists of linear striae of 

 growth, which are developed into slightly-raised lamina? on the 

 posterior slope. 



The sip honal inflection is very deep, reaching near to the 

 anterior scar, narrowly rounded at the end, and confounded 

 with the pallial line. 



This species comes near to T. imhellis, Hanley. 



Dimensions. — Antero-posterior diameter, 31 ; umbo-ventral 

 diameter, 18; sectional 'diameter of right valve, 3; length of 

 posterior side, 11*5 millimetres. 



Locality. — Aldinga Bay. 



Venerupis crebrelamellata, spec. nov. Plate iv., figs. 14a — b. 



Shell oblong, somewhat elliptical, tumid about the umbones 

 which are incurved, approximate, and anterior ; anterior side 

 attenuated ; roundly truncated behind ; concentrically closely 

 exfoliated. 



The anterior side is short, its dorsal margin straight, and 

 very sloping, and forming with the abruptly ascending slope of 

 the ventral margin a blunt angle ; the post-dorsal side is 

 slightly arched, descending to the narrow somewhat obliquely 

 truncated posterior margin ; the posterior part of the ventral 



