OF THE UPPER MISSOURI. ileal 
CHAPTER XVIIFI. 
REPTILES, FISHES, AND RECENT SHELLS. 
A. Reptiles. 
TESTUDINATA. 
TRIONYX, Yellowstone river. 
EMyYs ELEGANS, 4 ¥e 
Enys, Mouth of Powder river. 
Cistupo, - * s 
OPHIDIA. 
GaupisonA Lxconte!, Cope, Yellowstone river. 
CROTALUS TERGEMINUS, Say, : oH 
THAMNOPHIS SIRTALIS var. PARIETALIS, B. & G., Loup fork. 
THAMNoPHIS HaAyYpENI, Cope, Sand hills. 
'TROPIDONOTUS SIPEDON, Yellowstone river. 
Hereropon nasicus, B. & G., Sand hills of Loup fork. 
Piryoruis Sayt, B. & G., 5 a 
LAMPROPELTIS MULTISTRIATA, Kenn., Fort Benton on the Missouri. 
LAMPROPELTIS SAYI, Cope, Missouri river. 
NATRIX OBSOLETA, Cope, Missouri river to valley of the Platte. 
NATRIX RHINOMEGAS, Cope, is = : 
BASCANIUM FLAVIVENTRIS, B. & G., Head of Loup fork. 
LioPELTIS VENALIS, B. & G., Yellowstone river. 
SAURIA. 
SCELOPORUS CONSOBRINUS, B. & G., Sand hills, valley of the Platte. 
ScELOPoRUS GRACIOsUS, B. & G., 5 s e 
HOLBROOKIA MACULATA, Girard, ce ge 
HoxprooxiA DovueLasit, e¢ ce ¢ 
CNEMIDOPHORUS SEXLINEATUS, Dum., Bibr., . ‘f s 
PLESTIODON LEPTOGRAMMUS, Baird, “ « i. 
PLESTIODON MULTIVIRGATUS, Hallow., ee ee ce 
PLESTIODON INORNATUS, Baird, ee “ ‘8 
PLESTIODON SEPTENTRIONALIS, Baird, as rj re 
BATRACHIA. 
RANA HALECINA, Kalm, 
HELECETES TRISERIATUS, Max., Mouth of Yellowstone. 
Buro AMERICANUS, Lec., Along the Missouri river. 
Buro CoGNATUS, Say, eS <3 45 
VOL. XII.—23 
