a d 
34 Storer on the ; 
d 
white. 'T'welve plates upon t 
jaw, besides that at the chin. Three large white 
irregularly formed blotches, directly back of the oc- 
cipital plates; one above, and one on each side of 
the first. 
There are 124 abdominal plates, and 38 caudal 
scales. 
Inasmuch as the “ punctatus” sometimes exhibits 
merely a spot upon the occiput, instead of a circular 
band, the superficial observer might think that, and 
the species I have just described, as identical ; a lit- 
tle attention will show the marked differences be- 
tween them. 
HetTeErRopon. Palisot de Beauvais. 
Generic characters. Plates and scales as on the 
Colubri; the rostral plate a trihedral pyramid, 
with a ridge above, and pointed at the tip ; posterior 
maxillary teeth largest. 
H. platirhinos. Latreille. 
Daud. Hist. Nat. des Rept. tom. vii. p. 153. 
Harl. Med. and Phys. Res. p. 190. 
N. H. Herpetol. vol. ii. P. 97, et fig. 
I have never seen a specimen of this animal ; but 
Dr. Holbrook assures me he possesses an individual 
which was captured at Medfield. His description 
therefore is here introduced: ‘The head is large, 
flat, triangular, broad behind, with the snout pointed 
upper jaw, besides 
that at the snout; fourteen plates margin the lower |. 
