SYSTEMATIC POSITION OF VENOMOUS SNAKES 3 



Thus the order Ophidia is represented in the following synopsis, the veno- 

 mous snakes being given in italics: 



System Boulenger. 



Order Ophidia. 



Typhlopidse. 



Glauconiidae. 



Ilysiidas. 



Uropeltidae. 



Boidae (Pythoninae, Boinae). 



Xenopeltidae. 



Amblycephalidag. 



Colubridae. 



Aglyph (Acrochordinse, Colubrinae, Rhachiodontinae). 



Opisthoglyph (Dipsadomorphince, Elachistodontince, Homalopsinas). 



Protero glyph (Elapince, HydrophiincB). 



Viper idcB {Viper itta, Crotalince). 



As the great work of Cope is indispensable to a student of classification 

 of Serpentes, a concise form of his system, which was arranged with reference 

 to the penial structure as well as many other characteristics, is given below, 

 the venomous snakes being given in italics. 



System Cope.^ 



Order Serpentes. 



Superfamily. 



Family and Subfamily. 



Epanodonta 

 Catodonta. . 



Tortricina 



Peropoda 



ID 



J2 



"o 



u 

 O 



3 

 C/2 



Aglyphodonta 

 Glyphodonta . . 



Proteroglypha . 

 Platycerca .... 



Solenoglypha . 



Typhlopidae. 

 Glauconiidas. 



Ilysiidae. 

 Rhinophidae. 



Boidae. 



Charinidas. 



Ungaliidae. 



Xenopeltidae. 



Nothopidae (Acrochordinae, Nothopinae). 



Colubridae (Calamarinae, Xenodontinae, Dromicinae, 



Colubrinae, Leptognathinae, Anoplophallinae, Ly- 



codontinas, Natricinae). 

 Dipsadida {Erythrolamprince, ScytalincB, Dipsad- 



incB, Homalopsince). 

 NajidcB. 

 Elapidce. 

 DendraspididcB. 

 HydrophidcB. 

 A tractaspididce. 

 CausidcB. 

 ViperidcB. 

 CrotalidcE {Lachesince, Crotalina). 



' Cope, Ann. Rep. Smithsonian Institution, Washington, U. S. National Museum, 1898. 



