2. ITPHLOPS. 13 



40 to 42 scales round the middle of the 



body, the diameter of -which is 25 to 30 



times in the total 68. schlegelii, p. 44. 



28 to 30 scales round the middle of the 



body, the diameter of which is 35 to 50 



times in the total 69. delakmdii, p. 45. 



34 to 40 scales round the middle of the 



body, the diameter of which is 42 to 46 



times in the total 70. dinga, p. 45. 



j3. The portion of the rostral visible from below as long as 

 broad ; 30 to 38 scales round the body. 



Prseocular two thirds the width of the 



ocular, partly covering the eye 71. hvmbo, p. 46. 



PrsBOcular not two thirds the width of the 



ocular 72. mucruso, p. 46. 



6. Nasal cleft extending from the lower lateral border of the 

 rostral to the nasal ; 28 to 30 scales round the body. 



73. anomalm, p. 47. 



2. 26 scales round the middle of the body ; snout strongly 



hooked 74. schinzi, p. 47. 



3. 18 to 24 scales round the body. 

 a. Eye distinguishable. 



u. Diameter of body less than 50 times in the total length. 



24 scales round the body; rostral with 



obtusely angular edge 75. curvirostris, p. 48. 



22 scales round the body ; rostral with 



sharp edge 76. bicolor, p. 48. 



20 scales round the body ; snout trilobate . . 77. hituhereulatus, 



[p. 48. 

 /3. Diameter of body 50 times or more in the total length. 



* Tail not twice as long as broad. 



22 or 24 scales round the body ; tail not 



longer than broad 78. unguirostris, p. 49. 



18 scales round the body ; tail about once 



and a half as long as broad 79. afflnis, p. 49. 



20 scales round the body ; tail not much 



longer than broad ''. 80. arenarius, p. 49. 



** Tail twice to twice and a half as long as broad ; 

 20 or 22 scales round the body. 



Eostral extending to between the eyes. ... 81. mulHUneatus, p. 50. 

 Bostral not extending to between the 



eyes 82. olivaceus, p. 50. 



