TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 173 



15302. Coscinocyathus billingsi (Walcott). Holotype. 



Lower Cambrian. L' Arise au L,oup, Labrador. 



Walcott, Tenth Ann. Rept. U. S. Geol. vSurv., 1890, p. 600, pi. 51, 

 figs. 2-2b. 



See Archaeoc3< T atlius billingsi. 



25556. Cossonus rutus Scudder. Holotype. 



Older Tertiary. Roan Mountains, western Colorado. 



Scudder, Mon. XXI, U. S. Geol. Surv., 1893, p. 155, pi. 12, fig. 7. 



35359. Cranaena subelliptica Hall and Clarke. Plesiotypes. 



Waverly (Miss.). Sciotoville, Ohio. 



Girty, Prof. Pap. No. 16, U. S. Geol. Surv., 1903, p. 299, pi. 1, 

 figs. 6, 7. 



35360. Cranaena subelliptica hardingensis Girty. Cotypes. 



35361. Millsap (Miss.). Canyon and Garden Park, Colorado. 



Girty, Prof. Pap. No. 16, U. S. Geol. Surv., 1903, p. 299, pi. 1, 

 figs. 8-10. 



35163. Crania laevis Keyes. Plesiotype. 



Madison (Miss.). Crowfoot Ridge, Yellowstone National 

 Park. 



Girty, Mon. XXXII, Pt. II, U. S. Geol. Surv., 1899, p. 520, pi. 

 68, fig. ia. 



8053. Crassatella cimarronensis White. Cotypes. 



Fox Hills (Cret.). Cimarron, New Mexico. 



White, Eleventh Ann. Rept. U. S. Geol. Surv. Terr., 1877 (1879), 

 p. 287, pi. 5, figs. 3a-3C 



13339. Crassatella collina Conrad. Holotype. 



Miocene. Santa Inez Mountains, Santa Barbara Count3^, 

 California. . 



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

 VII, 1857, p. 193, pi. 6, figs. 1, 2. 



553. Crassatella cuneata Gabb. Cotype. 



Ripley (Cret.). Eufaula, Alabama. 



Gabb, Synop. of the Mollusca of the Cretaceous Formation, 186 1, 

 p. 112. 



See Crassatella pteropsis. 



2490. Crassatella declivis Heilprin. Holotype. 



Eocene. Aquia Creek, Virginia. 



Heilprin, Proc. U. S. Nat. Mus., Ill, 1880. p. 151, fig. 9. 



322. Crassatella ( Pachythaerus ) evansi (Hall and Meek), 



Plesiotypes. 

 Port Pierre (Cret.). Near Sage Creek, on Che3 T enne 

 River, South Dakota. 



Meek, Rept. U. S. Geol. Surv. Terr., IX, 1S76, p. 117, pi. 17, 

 figs. 6a-d. 



