TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 47 



12254. Anisomyon borealis (Morton). Plesiotype. 



Fort Pierre (Cret.). Cheyenne River, Black Hills, South. 

 Dakota. 



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

 p. 436, pi. 12, fig. 23. 



8649. Anisomyon borealis (Morton). Plesiotypes. 



Montana (Cret.). Gallinas Creek, New Mexico. 



White, Rept. U. S. Geogr. Surv. W. 100th Merid., IV, Pt. I, 1S76, 

 p. 193, pi. 18, figs. 9a, b. 



12430. Anisomyon centrale Meek. Cotypes. 



Fox Hills (Cret.). Box Elder and Colorado City, Colo- 

 rado. 



Meek, Fourth Ann. Rept. U.S. Geol. Surv. Terr., 1871, p. 312. — 

 White, Eleventh Ann. Rept. U. S. Geol. Surv. Terr., 1879, 

 P- 3°3< pl- 9, fi gs. ia-d 



8659. Anisomyon centrale Meek. Plesiotype. 



Montana (Cret.). Gallinas Creek, New Mexico. 



White, Rept. U. S. Geogr. Surv. W. 100th Merid., IV, Pt. I, 1876, 

 p. 194, pl. iS, figs. 8a, b. 



246. Anisomyon patelliformis Meek and Hayden. Cotypes. 



Montana (Cret.). Yellowstone River, near Miles City, 

 Montana. 



Meek and Hayden, Am. Journ. Sci., (2), XXIX, i860, pp. 34, 35, 

 pl. 1, figs. 1-3.— Meek, Rept. U. S. Geol. Surv. Terr., IX, 

 1876, p. 290, pl. 18, figs. 5a-c, 5e, 51. 



See Helcion patelliformis and Acmaea ? papillata. 



12268. Anisomyon patelliformis Meek and Hayden. Plesiotypes. 

 Fort Pierre ( Cret. ) . Old Woman Fork of Cheyenne River, 

 Wyoming. 



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

 P- 435. pl- I2 , figs. 17, 18. 



249. Anisomyon sexsulcatus (Meek and Hayden). Holotype. 

 Montana (Cret.). Yellowstone River, near Miles City, 

 Montana. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 293, pl. 18, figs. 

 8a, 8b. 



See Helcion sexsulcatus. 



245. Anisomyon shumardi Meek and Hayden. Holotype. 



Fort Pierre (Cret.). Great Bend of Missouri, below Fort 

 Pierre, South Dakota. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1876, p. 289, pl. 18, 

 figs. 7a-c. 



