SuTER. — 'New Species of Tertiary Mollusca. 297 



anterior and posterior angle. Anterior end short, not quite one-fifth of 

 the total length, convex, the dorsal margin descending, concave ; posterior 

 end very distinctly truncated, the dorsal margin convex ; hasal margin 

 broadly convex, with an angle behind the middle and on meeting the pos- 

 terior truncation. Lunule narrow and long. Escutcheon depressed, long 

 and narrow. Sculpture consisting of distant (about 10 on adult shells), 

 thin, erect, inequidistant concentric laminae, sharply raised posteriorly 

 and at the intersection of the submedian and posterior ridge ; interspaces 

 with fine growth-lines and traces of fine radiate striae. Margins finely 

 crenulate. Left valve with a subvertical, long and narrow cardinal ; the 

 median tooth stout, triangular, bifid ; the posterior cardinal nearly hori- 

 zontal, long and thin. 



Length, 61 mm. ; height, 54 mm. ; diameter, 12 mm. ( x 2) (holotype). 



Holotypes (2) and paratypes (5) in the Canterbury Museum, Christchurch. 



Locality. — Lower ,<;orge of Waipara, lower horizon (R. Speight). Miocene. 



Remarks. — This species is very nearly allied to the Pliocene and Recent 

 Chione yatei Gray. Small specimens of C. speighti are also in the collection 

 of the Geological Survey, from the Miocene of the lower part of the Pareora 

 River (Enys coll.) ; loc. 458. C. yatei is most likely the descendant of 

 C. speighti. The species is named in honour of Mr. R. Speight, Geologist 

 at the Canterbury Museum. 



Art. XXXVL — Some Localities for Fossils at Oamaru. 



By P. Marshall, M.A., D.Sc, Professor of Geology, Otago University, 

 and G. H. Uttley, M.A., M.Sc, Waitaki High School. 



[Read before the Otago Institute, 3rd December, J912.] 



The district of Oamaru has attracted attention ever since geological ob- 

 servations have been made in New Zealand. Mantell,* probably the first 

 qualified geologist to visit the South Island, gave a general description 

 of the district in 1850. In this description he names several fossils that were 

 found in the Ototara limestone, one of the most important strata that occur 

 in the district. 



More recently McKay, whilst engaged in the geological survey of New 

 Zealand, paid several visits to the region, and the results that he obtained 

 are embodied in the reports of the Geological Survey, a list of which will be 

 found at the end of this paper. So important was Oamaru considered 

 by Captain Hutton that he established the district as the typical locality 

 of his Oamaru system, then considered by him to be the equivalent of the 

 Lower Miocene of Europe. f At the same time he classed the upper strata 

 at Oamaru in a distinct system, called by him the Pareora system, aiul 

 considered equivalent to the Upper Miocene. In 1885 he still held in 

 general to this division, but he then correlated the Oamaru system with 

 the Oligocene.f 



* Q.J.G.S., vul. ti, 1850, pp. 319 el aeq. 



t " Geology "f Otagn and Sonthhirul," p. 4(i. Diincdin, 1875. 



j Q.J.G.S.," vol. 41. p. 191. 



