152 



mens. The hinge teeth show that the species is a true Eriphyla, but the 

 beaks are not quite as prominent in the shells from the Vancouver 

 Cretaceous as they are in the types from California. 



Cyprimbria lens, Gabb, (Sp.) 

 Plate 17, figures 15 and 15a. 

 M»T9tTix lens, Gabb.— Pal. Cal., Vol. I., p. 164, pi. 23, fig. 143. 



North-west side of Hornby Island, in Division D ; and Sucia Islands, in 

 Division A. The few specimens collected by Mr. Richju'dson all belong 

 to the broadly and transversely ovate, or subcircular form of the species. 

 There is no distinctly margined or well defined lunule, and the three 

 hinge teeth of the left valve are well shown. The first and second are 

 elighlly divergent, and the third, or posterior tooth, is parallel to the 

 thick fulcrum, from which it is only separated in part by a shallow 

 groove. The second and third teeth are thin and laminar, but the first, 

 or anterior tooth, is thick, and excavated in the middle, but not bifid. 

 It would appear also that there is a distinct sublunular tooth in the right 

 valve. 



(CyPRIMERIA ? TENUIS, MeEK. 



Dosinia? tenuis, Meek. — Proc. Ac. Nat. Sc. Phil., 1861., Vol. XIII., p. 315. 

 Cyprimeria ? tenuis, Meek. — Bui. Geol. and Geogr. Suit, of Terr., Vol. II., No. 4, p. 381, 



pi. 2, figs. 5, 5a and 5b. 



"At several places near Nanaimo, Vancouver Island, and on Newcastle 

 Island ; Cretaceous." Meek. Not in any of Mr. Eichardson's collec- 

 tions.) 



G-ENUS Thetiopsis, Meek. 



See Meek's " Keport on the Invertebrate Cretaceous and Tertiary Foggils of the Upper 

 Missouri Country," page 191. 



Shell like that of Thetis (Sowerby), but with the pallial sinus com- 

 paratively short and not ascending higher than the centre of the shell. 

 Pallial line crenated on either side of the sinus. Hinge teeth unknown. 

 Type : Venus (?) Circularis, Meek & Hayden. 



