209. DISTIRA. 287 
Rostral broader than deep; 35-42 
scales round the neck, 40-50 round 
the. body.) scsasd etc cele od seston Wp 3. ornata, p. 290. 
Rostral broader than deep; 28-383 
scales round the neck, 38—43 round 
ADE TIORY. «|. stoi s: og winraie poate Sees + 4. godeffroyi, p. 291. 
b. A single anterior temporal; 27 scales round the neck, 
38 round the body ; ventrals 329-335. 
Two postoculars; two labials entering 
TAUNTS doses. eels Ho Ke dae « 5. melanosoma, p. 291. 
One postocular ; three labials entering 
tO Ce Seen ae 6. semper, p. 292. 
2. Two pairs of chin-shields in contact on the middle line or 
the posterior separated by a single scale. 
a. A single anterior temporal. 
a. Rostral broader than deep; ventrals 300-354. 
23-25 scales round the neck; frontal 
hardly as long as its distance from 
Cie PORWR iia iv'a se gi ene caer 7. subcincta, p. 292. 
27-31 scales round the neck; frontal 
as long as its distance from the 
rostral or the end of the snout.... 8. brugmansii, p. 292. 
38 scales round the neck .......... 9. tuberculata, p. 293. 
f. Rostral as deep as broad; ventrals 372-400; 27-29 
scales round the neck.. 10. grandis, p. 293. 
b. Two or three superposed anterior temporals. 
a. Scales all imbricate. 
31-85 scales round the neck, 43-45 
round the body; ventrals 220-256. 11. macfarlani, p. 294. 
27-33 scales round the neck, 39-45 
round the body; ventrals 281-385. 12. cyanocincta, p. 294. 
26-27 scales round the neck, 48-49 
round the body; ventrals 278 .... 138. bituberculata, p. 296. 
B. Scales on posterior part of body juxtaposed. 
25 scales round the neck, 34 round 
the body ; ventrals 317.......... 14. belcheri, p. 296. 
27-29 scales round the neck, 38 round 
the body; ventrals 2538-260...... 15. pachycercus, p. 297. 
30-33 scales round the neck, 438-47 
round the body ; ventrals 300-387. 16. lapemidoides, p. 297. 
B. Frontal shield as broad as long; anterior ventrals relatively 
large ; 27-29 scales round the neck, 37-43 round the body. 
17. viperina, p. 298. 
III. Scales slightly imbricate, 15-17 round the neck, 19-21 round 
thé body P53 62 A Cae arene. 18. jerdoni, p. 299. 
