824 Transactions.— Geology. 
Length, 1:55 inch ; height, 1:47 inch. 
Locality. Wanganui. 
Mytilicardia trigonopsis. 
Shell small, higher than long, strongly radiately ribbed. Ribs ten, 
nodular, the interstices strongly concentrically striated. Anterior margin 
straight, long ; posterior dorsal margin straight, short, then suddenly bent 
down ; ventral margin regularly curved. 
Length, :18 inch; height, :15 inch. 
Locality. Wanganui and Petane. 
Anomia undata. 
Placunomia, sp. ind., Cat. Tert. Moll. of N.Z. (1873), p. 34. 
Shell broadly oval, transverse. Upper, or left, valve thin, rather in- 
flated, the surface gently rather regularly waved; the undulations take 
different directions on different shells, but are more or less parallel on the 
same individual. Muscular impressions three, confluent, forming a long 
oval mark sloping from before the umbo to the centre of the shell; the 
upper one the largest, the other two sub-equal. 
Length, ‘88 inch ; breadth, *7 inch. 
Locality. Petane. 
— OF eui XVIII. 
Turrieula marginata. 
Cominella elongata. 
. Terebra costata. 
acsi hamiltoni. 
ure pey 
" Nx. 
Natica eap 
- Sigaretus undulatus. 
. Sigaretus cinctus. 
. Eulima medi 
. Aclis costellata. 
ostomia sulcata. 
- Odostomia georgiana. 
. Odostomia plicata. 
. Admete ambigua. 
. Turritella planostoma. 
. Rissoa emarginata 
. Rissoa gradata. 
- Scalaria corulum. 
m m pei pmd 
dic e Ce e tapa 
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