242 Zoological Society : — 



Notice of a New American Form of Marsupial. 

 By R. F. Tomes, Corr. Memb. 



Genus Hyracodon, Tomes. 



General form somewhat slender. Tail as long as the head and 

 body, tapering evenly to a fine point. Feet long, and furnished with 

 an opposable thumb ; nails somewhat long and pointed. Head 

 rather long ; muzzle pointed ; ears of medium size, ovoid. Upper 

 incisors : middle teeth simple, pointed, small, and in a vertical posi- 

 tion ; the following two large, thick, and short, but having a semi- 

 acute point, which has a very backward direction ; the following one, 

 or fourth, similar, but very small ; the fifth, or canine, separated 

 from the preceding by a considerable interval, small, conical, acute, 

 and nearly vertical in position ; the two succeeding teeth nearly 

 similar. Loioer incisors : middle teeth long, nearly straight, and 

 horizontal in position, as in the Shrews ; the four following teeth 

 more or less conical in form, closely packed together, and sloping 

 forward, small in size, and evenly diminishing from the first to the 

 last ; the fifth tooth has a canine-like form, a liUle more prominent 

 than the preceding, and curved forward ; the sixth small, conical, 

 vertical in position, and widely separated from the fifth. 



H. FULIGINOSUS, n. s. 



Tail sparingly covered with short hairs of a dusky colour, through- 

 out the whole of its length, both above and below ; upper surface of 

 the feet sparingly covered with hairs similar to those of the tail ; 

 ears nearly naked, and of a dark brown colour; fur on all parts of 

 the body of a deep sooty-brown, scarcely paler on the under parts ; 

 all the naked parts brown. 



// //' 



Length of the head and body 3 8 



of the tail 3 8 



of the head 1 2 



Hab. Ecuador; collected by Mr. Fraser. 



On the Species of Craspedocephalus which occur in 

 THE Province of Bahia, Brazil. By Dr. Otho Wu- 

 CHERER, Corr. Memb. 



In a former paper, containing the first portion of a list of the 

 Ophidians which I had been able to collect in this province, I abs- 

 tained from certain remarks on some species of the above genus 

 until I should have collected more ample materials to corroborate 

 them. 



In the first place, I was struck by the fact that all the specimens 

 of " Jararaca " which had up to that time come to my notice were 

 very similar, and belonged to one species, Craspedocephalus atrox. 

 Having collected more than thirty specimens, I proceeded to examine 

 them more closely for comparison. Dr. Gray, in the 'Catalogue of 

 Viperine Snakes in the Brit. Mus.' 1849, comments on the difficulty 



