GEOLOGY OF LA SALLL COUNTY. 83 



REPTILIA OR RLPTILP^S— TURTLES, SNAKES. 



The reptiles are not so numerous as the birds, and 

 have been less carefully studied than they. 



Box Turtle — Cistudo Carolina — not numerous. 



Painted Turtle, Mud Turtle — Chrysemys picta — 

 sides marked with brig-ht red. 



Snapping- Turtle — Chelydra serpentina, C. 



Common Soft-shelled Turtle — Aspidonectes spin- 

 ifer — Illinois and canal. 



Lacertilla — Lizards — Blue Tail — Eumeces fascia- 

 tus — on rocks near old fair g-round. 



Ophidia — Serpents — ^Colubrid^, having- no poison- 

 ous fang-s. 



Spreading- Adder, Blow Snake, Puffing- Adder, 

 Hog--nosed Snake — Heterodon platyrhinus — about the 

 canons. 



AVater Snake, Water Adder — Tropidonotus sipi- 

 don — T. rhonibifer and T. g-rahami. 



Garter Snake — Eutaemia sirtalis — and probably E. 

 faireyi and E. proxima. 



Black Snake — Bascaniom constrictor — blue racer 

 — Coluber obsoletus — g-reen snake — Cyclophis vernalis 

 — milk snake, spotted adder, house snake— Ophibolus 

 doliatus,' var. triang-ulus — bull snake — Ophibolus calli- 

 g-aster, are found in the county, the last quite common. 



Crotalidae, having- erectile, g-rooved, poisonous 

 fang-s. 



Banded or Yellow Rattlesnake — Crotalus horridus 

 and the prairie rattlesnake or massassaug-a— Caudisona 

 catenala— both becoming- very scarce. 



BATRACHIA — FROGS, TOADS, ETC. 



Leopard or Common Frog- — Rana viresens — The 

 bull frog- — R. catesbeana, C. 



