Venericardia.] PELEOYPODA. 907 



gins crenate. Hinge : Right valve with a strong, triangular, oblique 

 cardinal tooth, the anterior and posterior cardinals feeble ; left valve 

 with a long lamellar posterior and short triangular anterior cardinal 

 tooth ; laterals very small. Ligament rather short. Adductor-scars 

 subequal, distinct. Pallial line simple. 



Diameter Ant. -post., llmm.; dorso-ventral, 10 mm. : thickness, 

 6 mm. 



Type in the British Museum. 



Hah. New Zealand (Cuming). Cape Maria van Diemen, in a 

 sponge (Webster). Tasmania and Australia. 



Remark. I have not seen New Zealand specimens. 



4. Venericardia Bollonsi, Suter, 1907. Plate 53, figs. 1, a, b. 



Venericardia (Pleuromeris) Bollonsi, .Suter, P. Mai. S., vii, 1907, 211, pi. 18, 

 f. 8-86. 



Shell small, ovate, solid, slightly inequilateral, and with nodulous 

 radiate ribs. Beaks approximate, but little anterior, high and erect, 

 prosogyrate, incurved ; prodissoconch very small, pointed, and smooth. 

 Anterior end with the dorsal margin descending and slightly concave, 

 thence subangularly rounded ; posterior end sharply convex, dorsal 

 margin descending, long, and a little convex, basal margin regularly 

 and broadly rounded. Lunule subcordate, finely striated. Escutcheon 

 lanceolate, long and narrow, minutely striate, bounded by a carina. 

 Sculpture : 14 strong radial beaded ribs with slightly broader inter- 

 spaces ; numerous concentric ridges, more prominent distally and at 

 the base. Colour brown, much lighter towards the beaks. Interior 

 white, porcellanous. Margins strongly fluted. Hinge solid ; right 

 valve with a stout triangular central cardinal, which is laterally micro- 

 scopically striate, anterior and posterior cardinals not well developed, 

 an anterior lateral tooth is distinct, the posterior very feeble ; left 

 valve with 2 divergent cardinals, the anterior stouter and triangular ; 

 a large lamelliform and marginal posterior lateral tooth is present, 

 which is connected above with the posterior cardinal, the anterior 

 lateral much less distinct, elongated and distant. Ligament very short. 

 Adductor-scars oval, distinct, the anterior deeper. Pallial line simple 

 and entire. 



Length, 9 mm. ; height, 8 mm. ; diameter, 4-5 mm. 



Type in my collection. 



Hob. Port Pegasus, Stewart Island, in 18 fathoms, type (Captain 

 Bollons) ; off Otago Heads (A. Hamilton). 



5. Venericardia zelandica, Deshayes, 1854. Plate 53, fig. 2. 



Cardita zelandica, Desh., P.Z.S., 1852 (1854), 101 : not Venericardia zelandica, 

 Potiez and Michaud, 1838, which is Chione Stutchburyi, Gray. C. luteu, 

 Hutton, M.N.Z.M., 159. Venericardia lutea, Button : Betlley, T.N.Z.I., 

 xxxviii, 73, pi. 1, f. 6. Cardita compressa, Reeve: Button, P.L.S. 

 N.S.W., ix, 527. Venericardia comprexxa. Reeve, Index, 93 ; not of 

 Reeve. 



Shell small, orbiculato-subtrigonal, subequilateral, pale-brownish, 

 radially ribbed. Beal-s approximate, small, pointed, incurved. An- 



