12 REPTILES. 
labial plates small; tail with a rather large, compressed, curved, 
terminal claw; pupil oblong, erect. Asia and Africa ? 
Megera, Wagler, Amph. 174, 1830. Megera, Sect. 1., Gray, 
Zool. Mise. 49, 1840. 
1. The Green Mecera. Megera trigonocephala, Wagler, 
Syst. 174. Gray, Zool. Misc. 49. Vipera trigonocephala, Latr. 
Lacep. iii. 332. Daud. Rept. Scheuch. P. S.t. 749, f. 11. Lacep. 
20, i. t.5, f. 2. Cophias trigonocephalus, Merrem, Tent. Cophias 
nigromarginatus, Kuhl, Beytr. 90. Trigonocephalus nigromargina- 
tus, Schlegel, 541, t. 19, f. 14, 15. La tete triangulaire, Lacep. 20, 
ii. 132, t.5, f. 2. Trimesurus marmoratus, Gray, MSS. B. M. 
Glaucous green, paler beneath ; upper part of head with regu- 
lar black markings; middle of the back marbled with black ; lips, 
chin and front of belly white: head-shields flat, smooth; lip with 
two black streaks under the nose and eyes ; end of tail blackish. 
Var. 1. Crown of head green, with symmetrical black marks. 
a. In spirits. Halfgrown. S. Africa? Presented by Sir James 
M Gregor. 
b,c. In spirits. Adult and young. S. Africa? From Mr. War- 
wick’s collection. 
d, e. In spirits. Half grown and young. Ceylon. Presented by 
R. Templeton, Esq. 
Var. 2. Crown of head green, with black edge to the scales. 
f,g. In spirits. Adult and half grown. Ceylon. Presented by 
R. Templeton, M.D., R.E. 
2. The Ottve Meczra. Megera olivacea, Gray, Zool. Mise. 
49. Vipera olivacea, £. W. Gray, MSS. 1800, in Brit. Mus. fide 
Shaw. Col. olivaceus, Shaw, Zool. Parias olivacea, Gray, MSS. 
1830. | 
Yellow-olive, with a brown horizontal streak on each side of 
the back of the head; lips and beneath yellow; superciliary shields 
2, large, square. 
a,b. Adult. In spirits, rather discoloured. In the old collection 
named by Dr. Gray and Dr. Shaw. 
5. ATROPOs. 
Vertebral scales keeled, lateral ones smooth ; superciliary scales 
small, in a prominent arched series: hinder labial shields small ; 
head-scales convex or keeled. Asia. 
Atropos, Wagler, Syst. Amph.175, 1830. Gray, Zool. Misc. 49, 
1840. Craspedocephalus sp., Fitz. N. S. Rept. 62, 1826. 
