NO. 39.—: 1889.] ZOOLOGICAL TABLES. 



205 



2. — Two nasals ; one loreal, which is never much longer 



than broad ; all the upper labials reach labial 

 margin. 16 L. carinatus ; 25 Z. fasciolatus ; 26 0. 

 helena ; 29 T. ceylonensis ; 30 T. stolatus ; 31 T. 

 asperrimus. 



3. — As in a 2 , but the loreal is liable to become fused with 



the lower prse-ocular. 32 T. plumbicolor. 



4. — As in a 2 , but the loreal is elongate. 27 D. pictus ; 



28 D. caudolineatus ; 39 C. ornata. 



5. — As in a 2 ; nasal subdivided ; loreal fused with lower 



prse-ocular. 17 H. nympha. 



6. — As in a 2 ; a single nasal fused with the loreal. 19 



A. calamaria. 



7. — As in a 2 ; seventh and ninth upper labials exclude 



the eighth from the labial margin ; the eighth looks 

 like a temporal. 18 P. subpunctatus. 



8. — x4.s in a 2 ; the posterior nasal more or less deeply 



concave. 35 D. ceylonensis ; 36 D. forstenii. 



9. — As in a 2 ; loreal very large, twice as broad as long, 



received into a notch between the internasal and 

 anterior frontals. 15 L. aulicus. 



10. — As in a 2 , but the loreal is entirely wanting. 42 C. 



trimaculatus ; 43 B. ceylonicus ; 44 B. cteruleus ; 

 45 N. tripudians. 



B = 20 SlMOTES ARNENSIS. 



As in a, but the rostral is large and produced backwards, 

 reducing the internasals to narrow transverse shields. 



1 . — All the labials reach labial margin; two nasals ; the 



loreal liable to be fused with prse-frontal. 20 S, 

 arnensis. 



2. — As in b 1 ; loreal sometimes absent. 22 O. sublineatus. 



3. — As in b l ; loreal present. 23 O. subgriseus. 



4. — As in b 1 ; loreal longer than deep, entering the eye 



(fused with lower prse -ocular ?) ; fifth and seventh 

 labials excluding sixth from labial margin. 21 0. 

 templetonii. 



