156 STUDIES IN GEOLOGY, No. 3 



Venus latilirata Tuomey and Holmes, Pleioc. Fos. S. C., p. 85, 

 pi. 21, fig. 12, 1857; Emmons, Geol. Rept. N. C., p. 293, fig. 219, 

 1857; Dall, Trans. Wag. Inst, vol. 3, p. 1198, pi. 42, fig. 3, 1900. 



Circumphalus (Lirophora) latilirata Conrad, Proc. Ac. Nat. Sc. 

 Phila., for 1863, p. 575, 1864. 



Circumphalus (Lirophora) athleta (Conrad) Idem., pp. 575, 586, 

 1864. 



Chione (Lirophora) latilirata Dall, Trans. Wag. Inst., vol. 3, pt. 

 6, p. 1298, pi. 42, fig. 3, 1903- 



Chione (Lirophora) latilirata Glenn, Md. Geol. Surv., Miocene, 

 p. 309, pi. 77, figs. 3, 4, 5, 6, 1904. 



Chione (Lirophora) latilirata Gardner and Aldrich, (check list) 

 Proc. Ac. Nat. Sc. Phila., vol. 71, p. 19, 1919. 



Two specimens from the Lower Zorritos agree so closely 

 with typical specimens of C. latilirata from the Maryland 

 and Carolina Miocene that it is inadvisable to express a 

 difference. The only constant variation noticeable is that 

 the Peruvian forms are somewhat more inflated than the 

 North American, and that consequently the lirae of the 

 Peruvian specimens are more arcuate ventrally. The speci- 

 mens studied are both broken posteriorly, and it is con- 

 sequently impossible to compare the posterior marginal 

 angles, but indications are that with the exception of a 

 slightly greater obtuseness due to the deeper curve of the 

 ventral lira they probably agree. Length, (est.) 26; height, 

 22.25; (semi) diam. 10.5 mm. , 



Lower Zorritos. Quebrada Zapotal. 



Superfamily 



Family TELLINIDAE 



Genus TELUNA (Linnaeus) Lamarck 



Tcllina zapotalensis n. sp. 



PLATE X Figs, i, 2. 



Tellina sp. ind. A. Nelson, Trans. Conn. Acad., vol. 2, p. 201, 

 1870. 



