1867.] MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. 927 



More solid and inflated than the preceding, with the concentric 

 ridges stronger, and the radiate sculpture wanting. New South 

 Wales and Port Phillip. Length 6 lines. 



Fam. UngulinidjE. 



92. Mysia sph^ricula. 



Diplodonta sphcEricula, Deshayes. 



A thin, smooth, globular species, very much swollen towards the 

 umbones, pearly white, covered with a fibrous olive epidermis towards 

 the margins. Dredged in the Parraraatta River and mouth of Lane 

 Cove, in black mud in 3 or 4 fathoms. Length 10^ lines. 



93. Mysia globulosa. 



Diplodonta globulosa, A. Adams, P. Z. S. 1855, p. 226. 

 A rounded species, of a dirty-white or horn- colour, not unlike 

 D.janeirensis, Keeve. Dredged in Port Jackson. Length 7 lines. 



94. *Mysia (Felania) adamsi. 



Mysia (^Felania) adamsi, Angas, anteH, p. 910, PI. xliv. f. 9. 

 A depressed, orbicularly elongate, shining white species. Length 

 6 lines. Dredged in deep water. Port Jackson. 



95. *Mysia (Felania) jacksonensis. 



Mysia (Felania) jacksonensis, Angas, antetl, p. 910, PI. xliv. 

 f. 10. 



Of a pale rosy flesh-colour, covered with a light-greenish epidermis. 

 Length 4 lines. Dredged in Middle Harbour. 



Fam. Laseid.^. 



96. Lasea scalaris. 



Poronia scalai'is, Phil. 



A minute shell, broadly concentrically ribbed, having somewhat 

 the aspect of a Venus. Length 2 lines. Gregarious, in crevices of 

 rocks at low water in Port Jackson. 



97. Lasea australis. 



Poronia australis, Souv. Journ. de Conch. 1863, p. 287, pi. 12. 

 f. 8. 



Larger than the preceding, nearly smooth, and tinged with rose- 

 violet at the margins. Length 3 lines. In crevices of rocks, at low 

 water. Port Jackson ; New Caledonia (Montrouzier) . 



98. Kellia rotunda. 



Erycina rotunda, Desh. P. Z. S. 1855, p. 181. 

 A small, horny, triangularly orbicular species. Length 4 lines. 

 Port Jackson ; Newcastle, New South Wales ; and Moreton Bay. 



