TVPK S!PECIMENS OF INVERTEBEATE FOSSILS. 425 



1388S. Mytilarca ( Plethomytilus ) oviformis (Conrad). 



Plesiotype. 

 Middle Devonian. Lone Mountain, near Eureka, Nevada. 



WmIcoU, Mou. Vlir, V. vS. Geol. Surv., 1884, p. 169, pi. 5, fig. 11. 



111603. Mytiloconcha incrassata (Conrad). Plesiotype. 



Miocene. vShiloh, New Jerse}-. 



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



fi<fS. lU, II. 



486. Mytilus attenuatus Meek and Haj'deu. Holotype. 



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



Meek and Ilaydeii, Proc. Acad. Nat. vSci. Pliila., VIII, 1856, p. 86. 

 — Modiola attenuata. 



1 33 1 9. Mytilus inezensis Conrad. Cotypes. 



Miocene. Santa Inez Mountains, Monterey County, Cali- 

 fornia. 



Conrad, Rept. Expl. and Snrv. R. R. Mis.s. Riv. to Pacific Ocean, 

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



153344. Mytilus pandionis Dall. Holotype. 



01ii;ocene. Near Osprey, Little Sarasota Bay, Florida. 



Dall, Tran.s. Wagner Free lust. Sci. Phila., Ill, I't. 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. Surw Terr., IX, 1876, p. 69, 

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



1 23 1 2. 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, pl- 37, fig- 9a- 



112140. Nassa bidentata (Ivmmons). Plesiotypes. 



Pliocene. Caloosahatchie River, near Fort Thompson, 

 Florida. 



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

 pl. 9, fig. 9. 



112142. Nassa caldosaensis Dall. Holotype. 



Pliocene. Caloosahatchie River, near Fort Thompson, 

 Florida. 



Dall, Trans. Wagner Free Inst. Sci. Phila., Ill, Pt. I, 1890, p. 134, 

 pl. 9, fig. 7. 



