198 THE CLASSIFICATION OF THE OPHIDIA. 



No rudimental pelvis or limbs ; a posterior maxillary tooth or teeth, grooved ; one lung rudimental. 



Glyphodonta. 

 No rudimental pelvis or limbs ; an anterior tooth with tube for poison duct ; one lung rudimental. 



Peotekoglypha. 

 II. Chevron bones complete, the lateral halves united below. 

 No rudimental limbs ; a tubular tooth in front of mouth ; one principal normal lung and a tracheal 

 lung Platycerca. 



It is questionable whether the A glyphodonta and Glyphodonta should he retained 

 as distinct from each other. Most of the penial characters found in the one occur in 

 the other, and it remains to ascertain whether these, or the grooving- or not of the 

 teeth, are to be considered to be of primary importance. For the present I follow the 

 example of Dumeril and Bibron and Boulenger. 



PEEOPODA. 



I find here three distinct families, as follows : 



Two pulmonary lungs, no tracheal lung ; nasal bones distinct ; a coronoid bone : hemipenis plicate. 



Boidm. 

 Two pulmonary lungs ; no tracheal lung ; nasal bones coossifled ; no coronoid bone ; hemipenis 



plicate Charinidm. 



One pulmonary lung, a tracheal lung ; two nasal and a coronoid bone ; hemipenis smooth.. * Ungualiidm. 



Boidse. 



"Within this family the characters of the hemipenis vary considerably. The 

 plica? are more or less undulate, and in some genera they fuse at intervals, producing 

 pockets which sometimes approach the character of calyces. The sulcus and generally 

 the entire organ are bifurcate. The plicse may also be represented at the apex by dis- 

 tinct papillae. The genera which I have examined present the following characters : 



I. Sulcus double. 

 a. Hemipenis single. 



Plicate and not papillose \ Eryx Daud. 



aa. Hemipenis furcate. 

 Entirely plicate % Boa Linn ; § Eunectes Wagl. 



C || Lichanura Cope. 

 More or less pocketed \ T Python Daud. 



I ** Enygrus Wagl. 

 Apex papillose \\ Epicrates Wagl. 



II. Sulcus single. 



Apex papillose , \\ Ohilabothrus D. and B. 



The sulcus in the Chilabotlirus sfriatus examined is divided for a short distance 

 when the branches reunite ; PI. XV, Pig. 3. 



* Cope, Proceeds. Amer. Philos. Soc, 1894, p. 220. 



f E. jaculus. | B. constrictor. § E. murinus. \\ L. trivirgata. 



|P, (Morelia) argus. ** E. carinatus. \\ E. angulifer. %\ G. striatus. 



