364 Dr. A. Giinther on new Species of Snakes. 



the latter shield is larger and longer than the posterior, which is 

 twice as broad as long. Vertical five-sided, rather large; occi- 

 pitals small, shorter than vertical, truncated behind. Loreal 

 square. The orbit is surrounded by four narrow shields (the 

 supraorbital not included), so that none of the labials enter the 

 orbit. Six upper labials ; temporals 2 + 3. Scales small, smooth, 

 in 17 rows. Ventrals 121; anal entire; subcaudals 15. 



Greyish olive above, with a vertebral series of subrhombic 

 white-edged black spots; neck with a triangular blackish spot, 

 the point of which is directed forwards, and resting on the ver- 

 tical shield. Lower parts whitish, along the middle blackish. 



This interesting species was discovered in Ugogo by Captain 

 Speke, on his expedition to the sources of the Nile. The single 

 specimen is 10 inches long, the tail measuring 10 lines. 



Ancistrodon Ulineatus. 



Shining deep black, with scattered white spots, arranged in 

 narrow, distant, transverse bands ; the white spots are more nu- 

 merous and irregular on the belly ; a yellow line runs from the 

 rostral along the canthus rostralis and the supraciliary edge to 

 behind the angle of the mouth. A yellow band along the upper 

 labials, the lower margin of which is black. Eostral with a ver- 

 tical yellow band, continued on the chin. Upper labials eight. 

 Scales keeled, in 23 series. Ventrals 137 ; subcaudals 65, the 

 14 last double. 



This beautiful species appears to be scarce ; Mr. Salvin found 

 it only once on the Pacific coast of Guatemala : the specimen is 

 39 inches long. 



Bothriechis Godmanni. PI. VI. fig. G. 



Scales in 21 series, strongly keeled, except those in the outer 

 row, which are smooth. Scales on the upper surface of the 

 head faintly keeled and of unequal size, three of them being as 

 large as the largest scales of the trunk ; supraciliaries well de- 

 veloped, without small scales along the orbital margin ; canthus 

 rostralis angular, covered with small shields, the posterior of 

 which enters the orbit. Rostral shield triangular, erect, not pro- 

 minent or elevated ; nasals small, separated by a suture ; nine 

 upper labials, the third of which is almost immediately below the 

 facial groove ; the fifth is the largest, below the eye, from which 

 it is separated by two series of very small scales ; the posterior 

 gradually decrease in size; ten lower labials. Ventrals 142; 

 subcaudals 28, the tail being short, very thin, and not prehensile. 

 Upper parts uniform brown ; a black band runs from the eye to 

 behind the angle of the mouth ; labial shields yellow ; a series 

 of rounded, light-edged black spots along the side of the anterior 



