12 REPTILES. 



labial plates small ; tail with a rather large, compressed, curved, 

 terminal claw ; pupil oblong, erect. Asia and Africa ? 



Megaera, JVagler, Amph. 174, 1830. Megsera, Sect. I., Grai/, 

 ZooL Misc. 49, 1840. 



1. The Green Megaera. Megaera 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, ii. t. 5,/. 2. Cophias trigonocephalus, Merrem, Tent. Cophias 

 nigromarginatus, Kuhl, Beytr. 90. Trigonocephalus nigromargina- 

 tus, Schlegel, 541, t. 19, /. 14, 15. La tete triangulaire, Lacep. 20, 

 ii, 132, t. 5, /. 2. Trimesurus marmoratus, Gray, 3fSS. 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. Half grown. S. Africa ? Presented by Sir James 

 M'Gregor. 



6, c. In spirits. Adult and young. S. Africa ? From Mr. War- 

 wick's collection. 



d, e. In spirits. Half gro\\Ti and young. Ceylon. Presented by 

 R. Templeton, Esq. 



Var. 2. Crown of head green, with black edge to the scales. 



/", g. In spirits. Adult and half grown. Ceylon. Presented by 

 R. Templeton, M.D., R.E. 



2. The Olive Meg^ra. Megcera olivacea, Grai/, ZooL Misc. 

 49. Vipera olivacea, E. 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. Ateopos. 



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. 



