Rohea trigonalis (Marwick). Plate 10, figs. 4–6.

1927. Paradione (Notocallista) trigonalis Marw., Trans. N.Z. Inst., vol. 57, p. 593, fig. 73.

Oligocene: Bed 6b, Clifden (Hutchinsonian).

Two topotypes in the Finlay Collection, a right and a fragmentary left valve, have been collected since the original was described. The left valve paratype described in 1927 and showing a hinge like that of parki came from a different horizon (band 7c) from the holotype and has a smaller lunule. It is not a trigonalis but a somewhat flattened parki.

References.

Cossmann and Peybot, 1911. Conchologie Néogénique de l'Aquitaine, tome 1, livr. 2.

Chant and Gale, 1931. Pliocene and Pleistocene Mollusca of California, Mem. San Diego Soc. Nat. Hist., vol. 1.

Headley, C., 1913. Studies on Australian Mollusca, Part XI, Proc. Linn. Soc. N.S. Wales, vol. 38, pt. 2.

Iredale, T., 1924. Results from Roy Bell's Molluscan Collections, Proc. Linn. Soc. N.S. Wales, vol. 49, pt. 3.

" 1929. Strange Molluses in Sydney Harbour, The Australian Zoologist, vol. 5, pt. 4.

Jukes-Browne, A. J., 1913. On Callista, Amiantis and Pitaria, Proc. Malac. Soc., vol. 10, pt. 6.

" 1914. A Synopsis of the family Veneridæ, Proc. Malac. Soc., vol. 11, pts. 1 and 2.

Marwick, J., 1924. The Veneridæ of New Zealand, Trans. N.Z. Inst., vol. 57.

Palmer, H. v. W., 1926. The Veneridæ of Eastern America; Cenozoic and Recent, Palæontographica Americana, vol. 1, no. 5.

Stewart, R. B. 1930. Gabb's California Cretaceous and Tertiary Type Lamellibranchs, Acad. Nat. Sc. Phil. Spec. Publ., no. 3.

Tegland, N. M., 1929. Correlation and Affinities of Certain Species of Pitaria, Univ. Calif. Publ. Bull. Dept. Geol. Sc., vol. 18, no. 10.

Woods, N. II., 1931. Pelecypoda from the Abattoirs Bore, including twelve new species, Trans. Roy. Soc. Sth. Aust., vol. 55.