345 



marked triangular pit. One of the adductors of the valves is 

 situated close under the termination of the hinge ; -whilst the 

 other is considerably removed therefrom, towards the oblique 

 prolongation of the shell ; pallial line simple, inside which is 

 a number of radiating striae. 



Dimensions. — Height 28 mm. ; length 31 mm. 



Form, and Loc. — Eocene, Miocene, and Pliocene (?) : South 

 Australia and New Zealand. 



L. 10444. Variation, in which the shells are abnormally high ; 

 from Parimoa. W. B. L. Mantell Coll. 



L. 10447. Several examples of both valves, showing con- 

 siderable variation in regard to tumidity ; from Willunga. 



H. Y. L. Brown Coll. 



L. 10450. Series illustrating stages of growth ; (locality ?) 

 New Zealand. \_Old Collection.'] 



Limopsis belcheri, Adams and Reeve (sp.). 



1850. Fectuncuhis belchei-i, Adams and Eeeve, Voy. Samarang, p. 76, pi. xxii. 



fig. 5. 

 1875. Zimopsis belcheri, M'Coy, Prod. Pal. Yict. dec. ii. p. 25, pi. xix. 



figs. 8, 9. 

 1886. limopsis belcheri, Tate, Trans. Eoy. Soc. South Aust. vol. viii. p. ISl. 

 1893. Limopsis belcheri, Tate and Deunaut, id. vol. xvii. pt. 1, p. 22-i. 



Similar to L. insolita, but rather more produced and oblique ; 

 the hinge-line is arcuate, the teeth are vertical in the centre and 

 become almost horizontal at the sides ; the triangular pit is 

 narrower; but the most conspicuous distinctions are the pro- 

 nounced radiating lineations on the surface, and the subordination 

 of the concentric growth-lines thereto, the reverse of which is the 

 case in L. insolita. 



Dimensions. — Height 22 mm. ; length 24 mm. 



Form, and Loc. — Eocene and Miocene (?) : Victoria and South 

 Australia. 



L. 350. Two examples of the neanic stage of growth ; from 

 Buirnsdale. Presented lij W. H. Grigson, Esq. 



L. 4836. Specimens of both valves of the adult ; from Muddy 

 Creek. Presented hy John Dennant, Esq. 



