142 ON TUE rilYSIOGNOMY OF SERPENTS. 



shining blackisli-brown ; the body surrounded with about 

 twenty broad white bands ; 17 rows of scales. S. 208 + 75. 

 From Bengal and Java. 



10. Lycodon modestus. Allied by its organization to 

 the Lycodon Clelia. Head more than usually conical ; 

 scales with a smooth surface, nearly square, and disposed 

 in 17 rows. S. 200 + 84. Colour above, deep broNvn, 

 the lower parts and the collar yellowish. Inhabits the 

 Isle of Amboina, and also New Guinea, where it acquires 

 a very large size, and has then very pale tints. 



11. Lycodon Nympha. Form slender ; head thick, and 

 muzzle obtuse ; eyes very large; 13 rows of smooth scales ; 

 abdomen narrow and angular. S. 220 + 85. Body bro\^^l, 

 ornamented with pale bands or spots. Inhabits Bengal. 



12. Lycodon audax, of Paraguay, approaches in shape 

 to the Dipsas. Form compressed and elongated ; tail 

 very thin and slender ; head thick behind ; varied with 

 brown and yellow, which form large che([uered and irre- 

 gular spots; plates of the head dark in the centre; 19 

 rows of scales. S. 200+ 110. 



13. Lycodon Petolarius, has a shape like the preceding, 

 but its head is a good deal narrower, and the body more 

 slender. Teeth of equal size. S. 210 + 100. Body 

 dark-brown, marked by numerous pale bands or rings, of 

 which the disposition varies in different individuals. In- 

 habits Guyana, and is also found in Brazil. 



The Coluber Dione of Pallas, a native of the Tar- 

 tarian deserts, should probably be classed in the genus 

 Lycodon. Never having examined this reptile, I leave to 

 other naturalists the task of comparing it with the Asiatic 

 species of the genus Lycodon. (Part II.) 



The fifth genus of Terrestrial SerjDcnts is the 



coluber. 



It comprehends all the terrestrial snakes of large size, 

 which, holding a middle place among Ophidians, present 

 nothing extraordinary in their organization. They ordi- 

 narily inhabit dry places, but some prefer the vicinity of 



