( xxvii ) 



CORONELLA. 



Scales in 17 to 23 rows. Ventrals not 



keeled. 

 Brown, with white collar ... C. orientalis. 



Nymphophidium. 



Two bony processes from the base of the skull, which protrude 

 through the mucous membrane of the mouth. 

 Brown, with two rows of dark spots ... N. maculatum. 



Elachistodok 



The spinous processes of the cervical verte- 

 brae protrude through the lining of throat 

 forming gular and ceisophageal teeth. 



Brown, with a yellow vertibral stripe ... E. Westermanni. 



Group h. — Coluhrina. 

 Snakes of moderate or large size. Scales in not less than 19 

 rows (except in Ptyas), often up to 27 rows smooth or keeled. 



Cadmus. 



Scales smooth in 27 rows. Head cuneiform. 

 Rostral large. Nasals two ... C. cuneiformis. 



Coluber. . 



Scales smooth or partly keeled in 19 to 27 rows. One loreal. 

 2 prseoculars. 



Scales in 19 rows. Upper labials 8 ... C. porphyraceus. 



Scales in 23 rows ... C. Nuthali. 



COMPSOSOMA. 



Scales keeled in 19 to 23 rows. 1 prasocular. 

 Scales in 19 rows, smooth, with two minute 



apical grooves ... C. semifasciatum. 



Scales in 19 rows, keeled. Posteriorly 



blackish ... C. melanurum. 



Scales in 19 rows, keeled. A black streak 



across the end of the occipitals ... C. radiatum. 



