455 
This example was very brilliantly painted, the white rings of the 
specimen in spirits were in life deep flesh-colour. 
CoroNELLA DECORATA, Giinther, Cat. of Col. Snakes, p. 55. 
One specimen was brought to me from the Volcan de Fuego. The 
under surface of this when fresh was ochreous yellow. It differs, 
moreover, from Dr. Giinther’s description in not having the yellow 
spots on the side of the head and the yellow band on the anterior 
part of the trunk. 
TOMODON LINEATUS. 
Tomodon lineatus, Dum. et Bibr. vii. p. 936. pl. 73. 
A single specimen of this rare snake was taken at Duehas by an 
Indian. There are probably but two other specimens known in col- 
lections. 
The genus Tomodon appears to belong chiefly to Central America, 
T. lineatus, being found in Mexico and Guatemala, T. strigatus, 
Ginther, on the island of Laguna, whilst 7. dorsatus, the species 
nearest allied to Nenodon, extends southwards as far as Rio Janeiro. 
Dr. Giinther has referred this species to the genus Psammophis ; but 
its natural affinities point rather to Dromicus lineatus. It seems to 
be an intermediate form between those genera. 
TROPIDONOTUS ORDINATUS, Linn. 
The specimens collected by myself at Duefias either have the stripes 
not very conspicuous, with the intervals unspotted, and without occi- 
pital spots, or the stripes are very conspicuous, with intervals spotted 
with black on the anterior part of the trunk, and occiput without 
spots. They are to be referred to T. ordinatus, Linn., and 7. si7- 
talis, Linn. A single specimen was brought to me at San Gerénimo, 
which does not quite agree with any of the numerous varieties of this 
Snake described by the North American Herpetologists as so many 
species. The scales are in nineteen rows ; and there is one anterior, 
and on one side three and the other four posterior oculars. The scales 
are brown, except those forming the vertebral series and those of the 
three outer series, which with the ventral plates are yellowish olive. 
There are two alternate series of square black spots, in the intervals 
between the dorsal and lateral stripes, more strongly defined on the 
anterior part of the body, whilst they are more irregular and inter- 
mixed with yellowish olive spots on the posterior parts. The black 
spots, as well as the olive ones, are on the skin rather than on the 
scales. A series of black dots accompany the lateral stripe. There 
is a well-defined black collar on the neck. The scales on the tail 
are very strongly keeled. 
At Duefias this species is exceedingly common about the rushy 
margin of a small lake. Numbers may be seer on a sunny day 
basking among the reeds on the edge of the water, into which they 
dart on being alarmed. 
