THE CLASSIFICATION OF THE OPHIDIA. 209 



aaa. Fusiform. 



/?. A loreal plate. 



Tail abbreviated, rough Procinura Cope. 



Tail normal ; one nasal * Elapmnorphus Wieg. 



Tail normal ; two nasals ScolecopJiis Cope. 



AS. JSTo loreal. 



Two pairs of genials Tantilla B. & G. 



One pair of genials Pogonaspis Cope. 



III. Calyculate and capitate. (Capitati.) 



Calyces numerous ; colubriform ; anal double Sibon Fitz. 



IV. Spinous to apex. (Spinosi.) 



Fusiform ; rostral prominent ; anal divided Ogmius Cope. 



V. Apex with longitudinal plicae ; calyces few and irregular. 



Spines few ; head very distinct ; anal scutum double Trimorphodon Cope. 



The groups of Dipsadime from I to IV inclusive correspond in penial characters 

 to the groups similarly numbered in the Dromicinte and Scytalina? respectively. Group 

 aa of Division I resemble in the same characters the Lycodontime, with which I at 

 first associated them. 



HOMALOPSIN^E. 



I. Flounced ; sulcus bifurcate. 



Hemipenis bifurcate ; spines -numerous, small ; one internasal ; nasal plates not in contact behind rostral. 



Oantoria Gird. 



Hemipenis as in Cantoria, except that there are large spines below bifurcation ; nasal plates in contact 



behind rostral \ Hypsirhina Wagl. 



II. Not flounced ; sulcus bifurcate (hemipenis bifurcate). 

 a. No tentacles on muzzle. 



Spines numerous ; one internasal plate ; parietals undivided Homalopsis Kuhl. 



Spines numerous ; two internasal plates ; parietals subdivided Cerberus Cuv. 



aa. Tentacles on muzzle. 



Spines numerous ; one internasal ; parietals undivided ; tentacles lateral ; robust Eerpeton Lac. 



Spines feeble, minute ; parietals undivided ; tentacle median ; attenuate Langaha Brug. 



PROTEROGLYPHA. 



I have been able to examine a limited number of species of this superfamily, and 

 must therefore present an imperfect synopsis of the genera. I have examined enough 

 of the species to affirm that they present variations of type similar to those seen 

 among the superfamilies already considered. All the forms that I have seen have a 

 bifurcate sulcus and all are spinous. 



There are three families, as follows : 



A postfrontal bone ; fang grooved Najidm. 



No postfrontal bone ; fang grooved Mapidm. 



A postfrontal ; fang not grooved in front Dendraspididm. 



* Phalotris and Apostolepis probably belong here. 

 ■)• H. bocourlii Vaill. examined. 



