80 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



990. Trionyx foveatus Leidy. Cotype. 



Costal plate. lyaramie (Cretaceous). Long Lake, Ne- 

 braska. 



I/cidy, Proc. Acad. Nat. Sci. Phila., VIII, 1856, p. 73; Trans. Amer. 

 Phil. Soc, XI, i860, p. 148, pi. II, fig. 3. 



96. Trionyx guttatus Leidy. Type. 



Part of carapace. Bridger (Eocene). Church Buttes, Uinta 

 County, Wyoming, 



Leidy, Proc. Acad. Nat. Sci. Phila., 1869, p. 66; Rept. U. S. Geol. 

 Surv. Terr., I, 1873, p. 176, pi. 9, fig. i 



1 1 13. Trionyx leptomitus Cope. Type. 



Part of carapace. Wasatch (Eocene). New Mexico. 



Cope, Rept. to Engin. Dept. U. S. A., 1875, p. 35; Rept. U. S. Geogr. 

 Surv. W. looth Merid., IV, Pt. II, 1877, p. 44, pi. 26, figs. 1-3. 



inc. Trionyx leptomitus Cope. Paratj^pes. 



5366. (i) Parts of carapace; (2) right hyposternal. Wasatch 



(Eocene). New Mexico. 



Cope, Rept. to Engin. Dept. U. S. A., 1875, p. 35; Rept. U. S. Geogr. 

 Surv. W. looth Merid. IV, Pt. II, 1877, p. 44, (i) pi. 25, figs. 27- 

 31; (2) pi. 26, fig. 4 



2581. Trionyx radulus Cope. Type. 



Portions of costal and dorsal plates. Wasatch (Eocene). 

 Gallinas River, New Mexico. 



Cope, Syst, Cat. Vert. Eocene New Mexico, 1875, p. 35; Rept. U. S. 

 Geogr. Surv. W. looth Merid., IV, Pt. II, 1877, p. 45, pi. 26, figs. 

 11-16. 



2358. Trionyx vagans Cope. Type. 



Costal bones. Laramie (Cretaceous). Colorado. 



Cope, Ann. Rept. Geol. and Geogr. Surv. Terr, for 1873, 1874, 

 P- 453- 



I II 2. Trionyx ventricosus Cope. Cotypes. 



5460. (i) Parts of carapace; (2) left hyposternal. Wasatch (Eo- 



cene.) New Mexico. 



Cope, Rept. U. S. Geogr. Surv. W. looth Merid., IV, Pt. II, 1877, p. 

 45, pi. 64, figs. 7, 11-12. 



977. Trionyx sp. undet. 



Costal plate. Eocene. Little Sandy Creek, Wyoming. 

 Leidy, Rept. U. S. Geol. Surv. Terr., I, 1873, pl- 16, fig. 12. 

 41. Tylosaurus dyspelor (Cope). Type. 



Leidy, Rept. U. S. Geol. Surv. Terr., I, 1873, p. 271, pi. 35, figs, 

 i-ii; pi. 36, fig. 16. 



See Liodon dyspelor. 



43. Tylosaurus proriger (Cope). Plesiotypes. 



3885. (i) Caudal vertebra; (2) tooth; (3) fragments of jaw and 



3891. splenial bone; (4) extremity of snout. Niobrara (Cre- 



3894. taceous). Smoky Hill River, Kansas. 



Leidy, Rept. U. S. Geol. Surv. Terr., I, 1873, p. 274, (i) pi. 36, 

 figs. I, 2; (2) fig. 3; (3) pi. 35, fig. 13; (4) pi. 35, fig- 12. 



