81 



Genus UROPSOPHUS, Wagler. 



539. The Striped Rattle-Snake (Uropsophus durissus, Kalm ; Crotalus 



durissus, Linn.). 

 Wq. Linn. Syst. Nat. vol. i. p. 372. Cat. of Snakes in Brit. Mus. p. 19. 



Shaw, Zool. vol. iii. p. 333. 

 Hab. North America. Texas. 



Genus CRASPEDOCEPHALUS, Kuhl. 



540. The Atrox (Craspedocephalus atrox, Fitz. ; Coluber atrox, Linn.). 

 Fig. Fitz. N. Class. Kept. 61. Linn. Mus. Adolf, t. 22. f. 2. Cat. of 



Snakes in Brit. Mus. p. 6. 

 Hab. South America. 



Genus MEG.&RA, Wagler. 



541. The Green Megsera (Megcera trigonocephala, Wagler; Trigonoce- 



phalus nigro-marginatus, Schlegel). 

 Fig. Wagler, Syst. 174. Schlegel, 541. t. 19. f. 14, 15. Cat. of Snakes 



in Brit. Mus. p. 12. 

 Hab. Ceylon. Presented by Dr. Marshall. 



Order II. AMPHISB^ENIA. 



Body elongate, cylindrical, naked, with square imbedded plates, placed in cross 

 rings divided into two sets by a slight longitudinal groove on each side. 

 Tail short, contiguous, blunt. Tongue not sheathed, flat, enlarged and 

 nicked at the end, ending in two smooth threads, the rest covered with 

 large flat papillae or scales. Eyes small, under the skin ; eyelid none. Ear 

 hidden under the skin. Mouth small ; jaws not extensile. Feet none, or 

 rarely in front. Penis double. Vent rather transversely plaited. Skull 

 very solid ; orbits incomplete ; tympanic bone enclosed in the skull, ob- 

 lique ; parietal bone simple ; temporal and mastoid bones scarcely separate. 

 Catalogue of Amphisbcenia in British Museum. 



M 



