TYPE SPECIMENS OF INVERTEBRATE FOSSILS. 203 



13872. Cyrtina davidsoni Walcott. Cotypes. 



Upper Devonian. White Pine District, Nevada. 



Walcott, Mon. VIII, U. S. Geol. Surv., 1884, p. 146, pi. 3, figs. 2-2e. 



24426. Cyrtina hamiltonensis (Hall). Plesiotypes. 



24427. Base of Upper Devonian. Porcupine River and the Ram- 



parts, Mackenzie River, Canada. 



Meek, Trans. Chicago Acad. Sci., I, 1868, p. 99, pi. 14, figs. 5a, 5b, 

 10a, 10b. 



See Cyrtina panda. 



24428. Cyrtina panda Meek. Holotype. 



Base of Upper Devonian. Onion River, Mackenzie River 

 Basin, Canada. 

 Meek, Trans. Chicago Acad. Sci., I, 1868, p. 100, pi. 14, figs. 8a-d. 

 = Cyrtina hamiltonensis. 



28198. Cyrtoceras bafnnensis Schuchert. Holotype. 



Trenton (Ord. ). Head of Frobisher Bay, Baffin Land. 



Schnchert, Proc. U. S. Nat. Mus., XXII, 1900, p. 171, pi. 14, 

 figs. 11-13- 



14178. Cyrtoceras cessator Hall and Whitfield. Holotype. 



Dower Carboniferous. Near Kberhardt Mills, White Pine 

 District, Nevada. 



Hall and Whitfield, Rept. U. S. Geol. Expl. 40th Par., IV, Pt. II, 



1877, p. 27S, pi. 6, fig. 15. 



2812 1. Cyrtoceras cornulum Schuchert. Cotypes. 



Trenton (Ord.). Head of Frobisher Bay, Baffin Land. 



Schuchert, Proc. U. S. Nat. Mus., XXII, 1900, p. 170, pi. 14, 

 figs. 8-10. 



46525. Cyrtoceras minneapolis Clarke. Cotype. 



Stones River (Ord.). Minneapolis, Minnesota. 



Clarke, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1897, p. 808, pi. 59, figs. 7, 8. 



13987. Cyrtoceras nevadense Walcott. Holotype. 



Middle Devonian. Combs Peak, Eureka District, Nevada. 



Walcott, M011. VIII, U. S. Geol. Surv., 1884, p. 203, pi. 17, figs. 



7, 7a. 



46526. Cyrtocerina? schoolcrafti Clarke. Holotype. 



Black River (Ord.). Near Cannon Falls, Minnesota. 



Clarke, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1897, p. 774, pi. 47, figs. 12-14. 



46171. Cyrtodonta afnnis Ulrich. Holotype. 



Black River (Ord.). Six miles south of Cannon Falls, 

 Minnesota. 



Ulrich, Geol. and Nat. Hist. Surv. Minn., Final Rept., Ill, Pt. II, 

 1894, p. 540, pi. 39, figs. 20-22. 



