:;,s i 



Transactions. 



following twenty-seven species were found by us in the course of one day's 

 collecting : — 



TwrriteUa cavershamensis Harris. 

 Pol in ices gibbosus Hutton. 

 Cymatium n. sp. 



Phalium achatinum pyrum Lamarck. 

 Epitonium browni Zittel. 

 Turbonilla oamarutica Suter. 

 Mitra n. sp. 



Vexillum apicale Hutton. 

 Typhis maccoyi Tate. 

 Murex octogonus Q. & G. 

 Lapparia corrugata Hutton. 

 Ancilla bicolorata Gray. 

 n. sp. 



Marginella harrisi Cossman. 

 Turris altus Harris. 

 Maw/ilia rudis Hutton. 

 Dentalium mantelli Hutton. 

 Placunanomia zelandica Grav. 

 Limopsis zitelli Ihering. 

 Nucula hartvigiana Phil. 

 Pecten huttoni Park. 

 Lima colorata Hutton. 

 Crassatellites obesiis A. Adams. 

 Venericardia australis Lamarck. 

 Macrocallista assimilis Hutton. 

 Corbula pumila Hutton. 



Marginella conica Harris. 



Only six of these twenty-seven species are known to be Eecent, a per- 

 centage of 22-2. As stated previously, the beds at All Day Bay are similar 

 stratigraphically and lithologically to the Awamoa beds, but in a collection 

 of sixty-Jour species made at Awamoa in 1912 the percentage of Eecent 

 species was found to be as high as 35-5. 



Eifle Butts. 



At this locality, which is situated a short distance to the south of Cape 

 Wanbrow, the strata are dipping to the south at an angle of 35°. The 

 sequence is here perfectly plain, and the highest beds are composed of bluish 

 clay similar to that at Awamoa and All Day Bay. In descending order, 

 these are succeeded by greensands, limestone, and tuffs. Here, as at many 

 other places near Oamaru, the continuous deposition has been greatly 

 interrupted by the volcanic eruptions of the vicinity, which have caused 

 beds of tuff to be associated with the blue clay. Collections of Mollusca 

 were made from the blue clay, with the following result : — 



Turris altus Harris. 



Drillia awamoaensis Hutton. 



Surcula fusiformis Hutton. 



n. sp. 



Baihytoma albula Hutton. 

 Mangilia rudis Hutton. 



protensa Hutton. 



leptosoma Hutton. 



Turritella patagonica Sowerby. 



concava Hutton. 



sturtii Tate. 



n. sp. 



Crepidula gregaria Sowerby. 

 Nat i a i zelandica Q. & G. 

 Polinices suturalis Hutton. 



gibbosus Hutton. 



■ — — amphialus Watson. 

 Turbonilla oamarutica Suter. 

 Phalium achatinum pyrum Lamarck. 

 Vexillum apicale Hutton. 



Unctum Hutton. 



Siphonalia turrita Suter. 

 Alectrion socialis Hutton. 

 Ancilla bicolor Gray. 

 Marginella pygmaea Hutton. 

 — ■ — conica Harris. 

 Marginella harrisi Cossman. 



Of these thirty-eight species, only ten are Eecent — that is, a percentage 

 of 26-3. 



Cylichnella thetidis Hedley. 

 Dentalium solidum Hutton. 

 Placunanomia zelandica Gray. 

 Cucullaea attenuata Hutton. 

 Pecten sea modus Hutton. 

 Venericardia difficilis Deshayes. 

 Loripes laminata Hutton. 

 Tellina glabrella Deshayes. 

 Zenatia acinaces Q. & G. 

 Cytherea oblonga Hanley. 

 Corbula canaliculata Hutton. 



