( xxvi ) 



Scales in 13 rows. Upper labials eight. 



Loreal very small ... A. scripfcus. 



Scales in 15 rows. Upper labials six ... A. Rappii, 

 Scales in 17 rows. Upper labials five. Two 



prseoculars. One nasal ... A. olivaceus. 



Scales in 17 rows. Upper labials 7. Loreal 



united with postnasal ... A. Nicobarensis, 



Scales in 17 rows. Upper labials seven. 



One prseocular ... A. Sagittarius. 



Scales in 17 rows. Upper labials ten. Two 



posterior temporals : head black ... A. bistrigatus. 



Scales in 17 rows. Upper labials ten. Two 



posterior temporals : head brown ... A. Humberti. 



Scales in 17 rows. Upper labials ten. One 



posterior temporal ... A. coUaris. 



Cyclophis. 



Scales in 15 rows. One nasal. 



Anterior part of body with black longitu- 

 dinal bands ... C. frsenatus. 



Loreal united to nasal. One prseocular ... C. calamaria. 



Loreal united to nasal. Two prseoculars . . . C. nasalis. 



Loreal longer than high. 6 upper labials. 



Anal bifid ... C, monticola. 



Loreal small. 6 upper labials. Anal entire. C. catenatus. 



Nasal divided posteriorly. Three last 



upper labials sub-equal ... C rabri venter. 



Nasals two ... C, Oldhami, 



Odontomxts, 

 Scales in 13 to 15 rows.. Ventrals keeled. 

 Scales in 13 rows. Upper labials eight. 



Anal bifid ... 0. nympha. 



Scales in 13 rows. Upper labials seven. 



Anal bifid ... 0. semifasciatus. 



Scales in 15 rows. Upper labials eight. 



Anal entire ... 0. gracilis. 



