INNOCUOUS SERPENTS. 
161 
white, speckled with brown, and relieved by a row of large 
spots of a reddish brown, bordered with black. Inhabits 
Brazil. 
12. Dipsas Catesbyi. Has much similarity to the 
preceding ; but its form is much less elongated ; its 
muzzle is more broad, and truncated at the end ; the gular 
plates are much developed ; those of the head considerably 
wider ; its scales are larger ; the spots on the trunk are 
more extensive, and we may observe a collar and band of 
a light colour betvreen the nostrils. S. 162 + 82. From 
Guyana. 
13. Dipsas pavonina. Intermediate between the two 
last, in almost every respect. Head as in D. Catesbyi ; 
but the tail is longer, and furnished with 134 plates or 
scuta; abdominal plates 217 . Ground tint not verging 
to red ; spots all oval. Appears with the last to repre- 
sent the D. Weigeli at Guyana. 
14. Dipsas Bucephala. Said to come from Sumatra. 
Very recognisable by its very deep trunk ; by its small, 
but very broad, thick head, and by its extremely short 
muzzle ; by the size of its dorsal plates ; by the abdo- 
minal plates which advance just below the chin, &c. The 
plates of the head are very aggregated, and the frenals are 
absolutely v» anting. Point of the lower jaw bent up- 
wards. S. 200 + 105. Above of a reddish-brown, re- 
lieved by numerous wide transverse bands of reddish-yel- 
low, varied with brown. 
15. Dipsas Dieperinkii. Of middle size. Trunk 
high, more thick towards the head, which is proportion- 
ably larger than in any other species ; 21 rows of scales 
feebly carinated ; abdomOn a little angular ; pupil of 
the eye round ; teeth of equal length ; tail lengthened 
and slender ; above clear brown, with angular markings ; 
below verging on yellow ; a fine line behind the eye. S. 
224+ 150. From Surinam, where it is among the rarer 
species. 
16. DipsAS Boa. A curious and odd species, re- 
markable for the smallness of the plates on the top of the 
head, which are raised and convex ; for its very short 
muzzle, which is narrow and conical ; for the presence 
o 
