381 



most cliaracteristic feature of this genus ; the shell has the hinge 

 characters of Zenatla. 



Type. — Zenatiopsis angustata, Tate. 



Zenatiopsis angustata, Tate. 



1879. Zenatiopsis angustata, Tate, Trans. Phil. Soc. Adelaide, p. 129, pi. v. 



figs. &a-b. 

 1887. Zenatiopsis angustata, Tate, Trans. Eoy. Soc. South Aust. vol. is. 



p. 172. 



Narrower, more attenuated posteriorly, and the anterior side not 

 so abruptly arcuate as in the living Zenatia acinaces, Quoy and 

 Gaimard; from which it is also distinguished, at sight, by the thick 

 internal rib. Professor Tate quotes Table Cape as a locality for 

 the fossil, but Mr. Gr. B. Pritchard ' is of opinion that the Tas- 

 manian form is distinct, and calls it Z. fragilis. 



Dimensions cannot be given as all the specimens in the collection 

 are imperfect. 



Form, and Loc. — Miocene : Muddy Creek, Victoria. 



L. 6613, L. 9830. Several fragments. Purchased. 



Family MYID^. 



Genus CORBTJLA, Bruguiere. 

 [Ency. Meth. Vers. Coq., etc. t. ii. 1797, pi. ccxxx '^'\ 



Shell inequivalve, solid, gibbose, rostrate and obliquely angulate 

 posteriorly ; surface commonly concentrically ridged ; right valve 

 much larger and more convex than the left, and carrying a strong 

 anterior cardinal tooth, followed by the internal cartilage pit, and 

 one posterior cardinal tooth; left valve with a large anterior cardinal 

 pit, followed by a projecting, commonly spoon-shaped receptacle, 

 for the cartilage, and one posterior cardinal tooth ; pallial line 

 slightly sinuous posterioily. 



Type. — Corhida sulcata, Lamarck. 



' Proc. Roy. Soc. Vict. vol. viii. n.s. pp. 139, 140. 



2 Cf. Deshayes, Ency. Meth. Vers. t. ii. pt. 2, 1831, p. 8. 



