CROCODILIANS, LIZARDS, AND SNAKES. 955 



LYCODOIsTXIlSr.^. 



This group is intermediate iii peiiial cliaracter to several others. It 

 is allied to tbe Calamariiife tbrongb Grayia, and to the Dromicinte 

 througli Ilomalosoma. Pseudaspis shows resemblances in the hemipeuis 

 to the NatriciuiB, and Anomalodon is similar to Ilomalopsis. I find 

 that the flouncing of the penial structure is not sufficient to define the 

 group as I at first thought. 



I. Sulcus spermaticus undivided. 



a. Teeth continuous; longer posteriorly. 



Hemipenis spinous to apex; flounces indistinct; pupil round; nostril in pre- 



nasal ; fusiform Elapops Glinther. 



aa. Teeth Interrupted ; longer in front. 



Hemipenis flounced at apex ; pupil erect ; colubriform Lycodon Boie 



II. Sulcus spermaticus double. 



a. Teeth longer arteriorly; (hemipenis bifurcate). 



Hemipenis spinous to apex, not flounced; nostril in prenasal. 



Lijcophidium Fitzinger.' 



Hemipenis spinous, flounced Boddon Duni^ril and Bibron. 



Hemipenis spinous, flounced Lamprophis Fitzinger. 



aa. Teeth not longer anteriorly. 



Hemipenis not bifurcate Homalosoma Wagler. 



Hemipeuis bifurcate Pseudaspia Cope 



aaa. Teeth not longer posteriorly; (hemipenis bifurcate). 



Colubriform; rostral normal; spines very sparse.. . Dromicodryas Bouleuger.'^ 



Coronelliform ; rostral trihedral, prominent ; spines very numerous. 



Anomalodon Jan. 



The above genera are all Ethiopian, except Lycodon, which is Oriental. 



I have been able to examine but few genera of this subfamily as to 

 their penial structure. I therefore give a key of the genera supposed 

 to belong to this group by authors, most, if not all, of which are jn'operly 

 so referred. 



I. Anterior maxillaries not isolated. 

 a. Subcaudal scuta double. 



/3. Dorsal scales of equal size. 



Two nasals; nostril in the anterior; a loreal; body much compressed. 



Lycodryas Giinther. 

 Two nasals; nostril between; body not compressed; lores plane. 



JioUdon Dumt5ril and Bibron.^ 

 Two nasals; body not compressed; lores longitudinally grooved. 



Both roph thalm as Schlegel.* 



Two nasals ; nostril in the anterior Lycophidium Fitzinger."^ 



One nasal ; a loroal Meioporhlna Giinther. 



y3/3. Dorsal scales of unequal size. 



Vertebral series smooth ; body compressed Hormonoius Hallowell. 



Vertebral series smooth ; body round Lamprophis Fitzinger. 



Vertebral scries l)icarinate ; body round Simoce2}halus Gray.*" 



aa. Subcaudal scutella entire. 



Two nasals ; scales equal, smooth HoUiropholis Dumcril. 



' L. laterale Hallowell examined. '^ Lianthera Cope, Amer. Naturalist, 1893, p. 481. 

 ^Eugnathus Dunu'ril and Bibron. ^ Belongs perhai)s to Cohibrin;*'. 

 ^Alo2)ecium Dumeril and Bibron. " Heti-rolejiia Smith. Diaphorolepis Jan. 



