Classification of the North American Snakes 



Family 



CoLUBRID.S 



(concluded) 



Subfamily 

 Etc. 



II. Opisth- 

 ogl y pha: 

 Oneormore 

 pairs of 

 grooved 



North 

 Genus American Species 



Trimorphodon .. 



a - - Sibon 



fangs in rear -j Erythrolamprus . . i 



of upper Tanltlla 4 



jaw. 



Dipsado- 

 morphinae . . 



III. Pro- 

 teroglypha : 

 A pair of 

 short, erect, 

 perf ora ted 

 fangs, in 

 front of up- 

 per jaw. 



Elapinae. . . . 



This sub- 

 family em- 

 braces the 

 Cobras and 

 their allies 

 in the Old 

 World, and 

 the Coral 

 Snake s in 

 the New 

 , World. 



I Species Terrestrial 



Burrowing 



I Elaps. 



r 



( A ncistrodon 2 



Crotalinae.. < Sistrurus. 

 A pair of ycrotalus.. 



I Terrestrial 



I Semi-aquatic 



Terrestrial 



long fangs 

 ViPERiD/E -j f o 1 d i n g 

 against roof 

 of mouth 

 when j aws 

 tare closed. 



Total number of species : 1 1 1 . 



Explanatory: a. Signifies that the reptile leads a burrowing or sub- 

 subterraneous life. 



b. Terrestrial snakes are those species that prowl 

 above ground in search of their prey. 



c. Semi-aquatic reptiles are those that frequent the 

 borders of ponds and streams 



d. By the term secretive, we may signify those snakes 

 that are not often found prowling; they search 

 for their prey in stone-piles or under the loose 

 bark of decaying trees. 



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