TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 425 



13888. Mytilarca (Plethomytilus ) oviformis (Conrad). 



Plesiotype. 

 Middle Devonian. Lone Mountain, near Eureka, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 169, pi. 5, fig. n. 



1 1 1603. Mytiloconcha incrassata (Conrad ). Plesiotype. 



Miocene. Shiloh, New Jersey. 



Whitfield, Mon. XXIV, U. S. Geol. Surv., 1894, p. 38, pi. 5, 

 figs. 10, 11. 



486. Mytilus attenuatus Meek and Hayden. Holotype. 



Fox Hills (Cret.). Moreau River, South Dakota. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., VIII, 1856, p. 86. 

 = Modiola attenuata. 



13319. Mytilus inezensis Conrad. Cotypes. 



Miocene. Santa Inez Mountains, Monterey County, Cali- 

 fornia. 



Conrad, Rept. Expl. and Surv-. R. R. Miss. Riv. to Pacific Ocean, 

 VII, 1857, p. 194, pi. 8, figs. 2, 3? 



153344. Mytilus pandionis Dall. Holotype. 



Oligocene. Near Osprey, Little Sarasota Bay, Florida. 



. Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. IV, 1898, 

 p. 787, pi. 30, figs. 9, 10. 



354. Mytilus subarcuatus Meek and Hayden. Holotype. 



Fox Hills (Cret.). Dog River, near mouth of Judith 

 River, Montana. 



Meek and Hayden, Proc. Acad. Nat. Sci. Phila., VIII, 1856, p. 

 276.— Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 69, 

 pi. 38, figs. 2a, 2b. 



12312. Mytilus whitei Whitfield. Cotypes. 



Jurassic. Near Sun Dance Hills, Black Hills, South 

 Dakota. 



Whitfield, Rept. Geol. and Resources Black Hills Dakota, 1880, 

 p. 360, pi. 5, figs. 9-12. 



8177. Mytilus whitei Whitfield. Plesiotype. 



Jurassic. Near Fontanelle Canyon, western Wyoming. 



White, Twelfth Ann. Rept. U. S. Geol. Surv. Terr., Pt. I, 1883, 

 p. 147, pi. 37, fig. 9a. 



112140. Nassa bidentata (Emmons). Plesiotypes. 



Pliocene. Caloosahatchie River, near Fort Thompson, 

 Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phil., Ill, Pt. I, 1890, p. 133, 

 pi. 9, fig. 9. 



1 12 142. Nassa caloosaensis Dall. Holotype. 



Pliocene. Caloosahatchie River, near Fort Thompson, 

 Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. I, 1S90, p. 134, 

 pi. 9, fig. 7- 



