90 



V. exotica. The locality of the type of V. exotica is unknown, 

 but the species occurs in North Australia. 



Ovate rhomboidal, post-dorsal and ventral margins nearly 

 parallel, radially costated, transverse lamella? few and distant, 

 white or yellowish, painted with red angular lines posteriorly. 



55. Yenerupis carditoides, Lamarck, loc. cit., p. 508 ; 

 Eeeve, Mon., t. 1, f . 5. 



Hog Bay, Aldinga Bay, Port Adelaide Creek, Encounter 

 Bay. Also West Australia and Tasmania, New Holland 

 (Lamarck) . 



Very closely allied to the last, the dorsal margins more 

 sloping, concentric lamella? more numerous. 



56. Venerupis crenata, Lamarck, loc. cit., p. 508 ; Eeeve, 

 Mon., t. 1, f. 3. 



At the roots of mangrove trees, Port Adelaide Creek (Angas) ; 

 Noarlunga, Encounter and Guichen Bays. Also Tasmania and 

 New South Wales, New Holland (Lamarck). 



This, the largest of our species, is oblong, rather inflated, 

 concentrically exfoliated and irregularly frilled, decussated by 

 radial costa?. 



57. Yenerupis crebrelamellata, Tate, antea, p. 66, t. 4, figs. 

 14a— 145. 



Burrowing in stiff clay at the mouth of the Patawalonga, 

 Holdfast Bay. 



Narrow oblong, attenuated in front, densely concentrically 

 exfoliated frilled ; nearly one inch long. 



58. Yenerupis mitis, Deshayes, P. Z. S., 1853 ; Eeeve's Mon., 

 t. 4, f . 24. 



Port Elliot. Also New South Wales. 



Oblong, rectangular, concentrically ridged and striated, 

 densely radially costated ; attaining to three-fourths of an inch. 



59. Yexerupis Cumingi, Deshayes, P. Z. S., 1853, t. IS, 

 f. 3 ; Eeeve's Mon., t. 3, f. 18. 



In the crevices of rocks and hollow stones, Eapid Bay and 

 Encounter Bay ! (Angas). Type without locality. 



Shell ovate ; left valve included in the right ; concentrically 

 exfoliated, frilled. 



60. Yenertjpis obesa, Deshayes, P. Z. S., 1853, p. 5; Eeeve's 

 Mon., t. 3, f. 13. 



Encounter Bay (Angas); also Yictoria (type) and Tasmania. 



Family Yexerid^:. 



61. Tapes pabagella, Deshayes, P. Z. S., 1853, p. 10; 

 Eeeve's Mon., f . 66 ; Venerupis reticulata, Tenison Woods 



