TYPE-SPECIMENS OF FOSSIL VERTEBRATES. 63 



REPTILES. 



4213. Acherontemys heckmani Hay. Type. 



Carapace. Roslyn (Miocene). Roslyn, Kittitas County, 

 Washington. 



Hay, Proc. U. S. Nat. Mus., XXII, 1899, p. 23, pi. 6. 



2344. Alligator chamensis Cope. 'Type. 



Premaxillary. Wasatch (Eocene). New Mexico. 



Cope, App. FF3, Rept. Chief Engineers, in Rept. Sect'y War, II, 

 Pt. II, 1874, p. 603. 



= Crocodjdus chamensis. 



41 15. Alligator heterodon Cope. T^ype. 



Fragments of cranium. Wasatch (Eocene). Near Black 

 Buttes, Wyoming. 



Cope, Proc. Amer. Phil. Soc, XII, 1872, p. 544. 

 = Crocodylus heterodon. 



4972. Allosaurus medius Marsh. Cotypes. 



5452. Tooth, astragulus, and fragmentarj^ phalanx of hind foot. 



5453. Potomac (Jurassic) . Prince George County, Maryland. 

 Marsh, Amer. Journ. Sci. (3), XXXV, 1888, p. 93. 



4096. Anosteira radulina Cope. I^ype. 



Anterior and posterior marginal bones. Bridger (Eocene). 

 Bad L,ands, Hams Fork, Wyoming. 



Cope, Pal. Bull. No. 9, 1872, p. i; Proc. Amer. Phil.vSoc. XII, 1872, 

 P- 555; Rept. U. S. Geol. Surv. Terr., Ill, 1884, p. 128, pi. 18, 

 figs. 18, 19. 



4094. Anosteira trionychoides Cope. I^Ype. 



Costal bone. Bridger (Eocene). Bad Lands, Cottonwood 

 Creek, near Fort Bridger, Wyoming. 



Cope, Pal. Bull. No. i, 1872, p. 2; Proc. Amer. Phil. Soc, XII, 1872, 

 p. 461. 



= Plastomenus trionychoides. 

 218. Antrodemus valens (Leidy). See Poicilopleuron valens. 

 2315. Antrodemus valens (Eeidy). See Labrosaurus ferox. 

 4971. Astrodon altus (Marsh). See Pleurocoelus altus. 



2267. Astrodon nanus (Mansh). See Pleurocoelus nanus. (Also 

 catalogue numbers 4968, 4969, 4970, 5372.) 



4089. Axestemys byssinus (Cope). See Axestus by.ssinus. 



4089. Axestus byssinus Cope. I^Ype. 



Vertebrae, ilium, humerus, and various fragments of skele- 

 ton. Bridger (Eocene). Blacks Fork, Green River, 

 Wyoming. 



Cope, Pal. Bull. No. i, 1872, p. 3; Proc. Amer. Philos. Soc, XII, 

 1872, p. 462; Rept. U. S. Geol. Surv. Terr., Ill, 1884, p. 116, 

 pi. 15, figs. 1-12. 



^Axestemys byissinus. 



