O TTrnLOPIDiE. 



Snout with angular edge ; nostrils inferior ; 



26 or 28 scales round the body 2. nnilineatus, p. 15. 



Snout with angular edge ; nostrils lateral ; [p. 15. 



18 scales round the body 3. melanocepTialus, 



j^ II. A prseocular, in contact with the second, third, or second and 

 .-p ! third labials ; no subocular ; ocular in contact with labials. 



A. Snout rounded ; nostrils lateral ^ . 



1. Praeocular in contact with the second and third labials. 



a. Nasal cleft, or suture dividing the nasal, proceeding from 



the prseocular. 



20 scales round the body 4. braminus, p. 16. 



22 scales round the body 5. accedens, p. 17. 



b. Nasal cleft proceeding from the second labial. 



a. Nasals in contact behind the rostral. 



18 scales round the body 6. beddomii, p. 18. 



28 scales round the body 7. jagori, p. 18. 



/3. Nasals separated by the prsefrontal. 



* Nasal cleft extending to the upper surface of the 

 snout ; 22 scales round the body. 



Eostral about one third the width of the 



head 8. leuconielas, p. 18. 



Eostral hardly one fourth the width of the 



head 9. jerdoni, p. 19. 



** Nasal cleft not extending to the upper surface of 

 the snout. 



t Nasal not completely divided into two. 



+ 18 scales round the body ; diameter of body 

 60 to 90 times in the total length. 



Rostral about one third the width of the 



head 10. jjorrectus, p. 19. 



Rostral nearly half the width of the head . . 11. guenthcri, p. 20. 



Xt 20 scales round the body ; diameter of body 

 40 to 65 times in the total length. 



Rostral one third the width of the head . . 12. leucoproctus, p. 20. 



^ This arrangement into species with lateral or inferior nostrils is not perfectly 

 satisfactory, and in some doubtful cases it will be necessary to try both divi- 

 sions of this synopsis. 



