442 Zoological Society :— 
Emypa SENEGALENSIS, Gray. 
Cryptopus senegalensis, Dum. & Bibr. 
In spirits. Grey; beneath, white. Head above with many sym- 
metrical roundish white spots, and a short white streak in the centre 
of the crown; upper part of the neck with symimetrical white mar- 
bling. Upper shell grey, with small round scattered black spots, 
with a distinct central keel, which is rather broad and smooth in 
front, becomes suddenly narrow, and is converted into a series of close 
tubereles at the middle of the back. Back with rather irregular, 
often interrupted, somewhat concentric lines of small tubercles, which 
conyerge towards the central keel behind, and with a number of 
larger, isolated, but rather crowded tubercles on the middle of the 
front edge; sternum blackish, white on the margin. 
Hab. Senegal. 
On New Reptites anv Fisues rrom Mexico. 
By Dr. Atsert GUNTHER. 
A collection of Reptiles and Fishes made by one of the correspond- 
ents of M. Salldé in Mexico, and purchased for the British Museum, 
contains, besides many other scarce species—as Cubina grandis, Gray, 
Gerrhonotus imbricatus and tessellatus, Wiegm., Geophis (Cato- 
stoma) chalybea, Wagl. (scales keeled), Conopsis nasus, Gthr., Za- 
menis mexicanus, D. & B., Atropus undulatus, Jan, &c.,—the fol- 
lowing new species. 
SAURIA. 
MABOUIA BREVIROSTRIS. 
Diagnosis.—The snout (from the anterior margin of the eye) is a 
little shorter. than the width between the orbits. Twenty-four lon- 
gitudinal series of scales round the middle of the trunk, two entire 
and two half series along the back between the white streaks. ‘Two 
large anal shields in front of the vent, with a small additional one on 
each side. A series of large shields along the lower part of the tail. 
Back brown, separated from the sides, which are black, by a white 
streak, running from the snout, above the eye, to the origin of the 
tail, where it is gradually lost. Another streak, less distinct, borders 
the lower lip, and the black coloration of the side. Belly whitish, 
the centre of each scale being minutely dotted with greyish, 
Hab. Oaxaca (Mexico). 
' The general arrangement of the shields of the head being the same 
as in Mabouia agilis, it does not appear necessary to give a detailed 
description of them. The present species is very similar to the latter, 
but distinguished by a considerably shorter snout. The large scales 
on the back and the large anal shields are sufficient characters to 
distinguish it from M. Lacepedit, &e. 
OPHIDIA. 
LEPTODEIRA DISCOLOR. 
Diagnosis. —Anal bifid ; scales in nineteen rows. Posterior maxil- 
