INNOCUOUS SERPENTS, 
171 
Colour above, a deep leaden hue ; below yellowish, with 
two middle rows of blackish spots. S. 137 + 56. 
9. Homalopsis angulata. — Habit of a Tropidonotus, 
but it has a more massive form ; head large and rounded, 
covered by 8 rather small plates ; the single frontal ad- 
vances between the nasals ; eyes more than usually large ; 
19 rows of scales, strongly carinated. Yellowish, passing 
to red on the sides ; above varied by very broad angular 
spots of a deep colour, with their points prolonged down- 
wards, to form square alternate spots. Posterior teeth 
without a groove. S. 118 + 66. Lung simple. From 
the river Amazons to Martinique. 
10. Homalopsis plicatilis. — ^Well characterized by its 
very long and narrow head, but with a muzzle of remark- 
able shortness ; by its large, blunt, smooth scales disposed 
in 15 rows ; and by its colours. The frenal plate want- 
ing ; shape very vigorous ; trunk very thick and cylindri- 
cal. S. 134 + 38. Above of a brownish red; on the 
sides a very broad dark ray, accompanied by a series of 
spots ; below yellowish, with two rows of brownish points. 
From Brazil ; a very pretty variety of it exists at New 
Orleans, characterized by its vivid tints. 
11. Homalopsis Martii. — Head nearly as in H. plum- 
bea, but more depressed and more lengthened ; eyes very 
small ; nostrils very near the end of the muzzle ; trunk 
much more slender than usual, and cylindrical ; 15 rows 
of smooth scales ; body surrounded with rings of brown, 
alternately of two shades ; the adults are of an almost 
uniform black, and have a very shining skin. S. 158 + 
48. From the river Amazons to Surinam. 
12. Homalopsis Beinwardtii. — Of large size, and of an 
elongated form ; tail very short and thick ; 21 rows of 
smooth scales ; all the trunk of nearly equal thickness, and 
a little compressed ; physiognomy like that of H. plicatilis. 
Above blackish red-brown, below reddish yellow ; these 
two tints interlace on the sides, to form bands and spots. 
S. 180 + 42. Discovered in Louisiana. 
13. Homalopsis Leopardina. — -Allied to H. angulata 
by the structure of the scales, to H. plicatilis by the form 
of the head. A single frontal plate wedged between the 
nasals ; of a reddish brown, relieved on the upper parts 
