342 PECTTJNCULUS. 



L. 4828. Three specimens; from Muddy Creek:. 



Presented by John Dennant, Esq. 

 L. 5590. Example of the neanic stage of growth ; from Muddy 

 Creek. Presented hj Professor T. Rupert Jones, F.R.S. 



L. 6591. Specimens of both valves ; from Muddy Creek. 



L. 9895. Series illustrating stages of growth ; from Muddy 

 Creek. Purchased. 



L. 10446. Eight valve of the adult ; from Parimoa. 



W. B. D. Mantell Coll. 

 L. 10569. Many examples of both valves ; from River Murray 

 cliiis, near Adelaide. Presented hy William Evans, Esq. 



L. 10564. Both valves of the adult ; from Wanganui. 



Sir James Hector Coll. 



Pectunculus convexus, Tate. 



1886. Tectunculas convexus, Tate, Trans. Roy. Soc. South Aust. vol. viii. 



p. 138, pi. xi. figs. la-h. 

 1893. Pectunculus convexus, Tate and Dennant, id. vol. xvii. pt. 1, p. 224. 



More tumid and more boldly sculptured than any other species 

 of Pectunculus here mentioned ; the ligamental area is very small, 

 and the inner side of the margin strongly crenulated. The bold 

 radiating costse are about 24 in number and are crossed by fine 

 growth-lines closely-set. 



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



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



L. 4827. Left valve. Presented hy John Dennant, Esq. 



L. 6592. Examples of both valves. Purchased. 



Pectunculus flabellatus, Tenison- Woods. 



1878. Pectunculus fabellatus, Tenison-Woods, Trans. Roy. Soc. Vict. vol. xir. 

 p. 61. 



Shell more depressed than P. convexus, and the interspaces between 

 the costae are not as wide ; the ligament area, also, is much smaller. 



Dimensions. — Height 24 mm. ; length 23 mm. 



Form, and Loc. — Post-Pliocene : Limestone Creek, Glenelg river, 

 Victoria. 



L. 6569. Two specimens, rather waterworn. Purchased. 



