2. TrPHLOPS. 11 



2. Rostral more than one third the width of the head. 

 a. Nasal cleft proceeding from the second labial. 

 a. Eostral not half the width of the head. 



* Prseocular narrower than the ocular ; 22 scales 



round the body 40. verticalis, p. 32. 



** Prseocular larger than the ocular. 



22 scales round the body 42. longismnus, p. 33. (^^ 



18 scales round the body 43. conradi, p. 33. 



jS. Eostral at least half the ?width of the head. 



* Prseocular narrower than the ocular. 



22 scales round the body 48. austrcdis, p. 35. 



20 scales round the body 49. wiedii, p. 36. 



24 scales round the body 53. mucronatus, p. 37. 



** Prseocular as broad as the ocular. 



20 scales round the body ; tail longer than 



broad 50. exocoeti, p. 36. 



22 scales round the body ; tail longer than 



broad 51. hipartiius ', p. 37. 



22 scales round the body ; tail as long as 



broad 52. tenuieollis, p. 37. 



6. Nasal cleft extending from the first labial to the upper 

 surface of the snout ; 22 scales round the body. 



Eostral exticnding to the level of the eyes . - 46. polygrammicus, 

 Eostral not extending to the level of the [p. 34. 



eyes 47. regirue, p. 35. 



c. Nasal cleft proceeding from the first labial, not ex- 

 tending to the' upper surface of the snout ; tail broader 

 than long. 



a. 18 or 20 scales round the body. 54. elegans, ^p. 37 . 



/3. 22 or 24 scales round the body. 



Diameter of body 66 times in the total 



length '. 55. decoroms, p. 38. , 



Diameter of body 43 to 50 times in the 



total length 56. ohtusus, p. 38. 



Diameter of body 23 to 30 times in the total 



length 57. fornasinii, p. 38. 



y. 30 scales round the body .... 58. hlanfordii, p. 39, 



' The place assigned to this species in the present synopsis may prove 

 incorrect on examination of the type specimens, the original description being 

 insufficient. 



