52 Contribution towards the knowledge of snakes in Brazil 
Dimensions — Total length 695 mm. Length of tail 200 mm. 
Habitat — State of São Paulo. 
Type — N.º 1.843 of the Butantan Institute snake collection, 
Received alive on XII-4-1919 and collected in Costa Pinto Station, 
Sorocabana Railway, by Mr. ANTÓNIO VITO D'ALKMIM. 
Note — IThis first species is dedicated to the esteemed deceased 
assistant of this Institute, Dr. JoÃo FLORÊNCIO GOMES who initiated 
me in the systematic studies of snakes. 
Variations — Besides this type 12 other specimens of this 
species were examined. All are from the interior of the State 
of São Paulo. Variations found were as follows: 
Ventrals, 123-132. Anal divided. Subcaudals, 34 --n — 94 pairs, 
Frontal with median longitudinal salience more or less accentuated, 
excepting specimen m.º 1.897 im which it js smooth; its posterior 
extremity rounded, excepting specimens n.ºs 272 and 455, in which 
it is pointed; as broad anteriorly as posteriorly, excepting specimens 
n.ºs 1.391 and 263 (young ones) in which it broadens osteriorly; 
nearly three times as long as broad, excepting specimens n.ºs 
1.391, 371 and 1.641 in which it is exactly twice as long and 
n.s 24,3, 1.391 and 1.398 (young ones) in which it is only once 
and three-quarters as long; about twice and a half as long as 
the diameter of the eye. Temporals 1 +-2, excepting the specimens 
n.ºs 1.627 and 1.641 which on the left side have 1-3, n.ºs 272 
and 274 which have on the right side 1-3 and n.º 271 which 
has on both the sides 1--3; n.º 455 bas a small anomalous 
scale below the inferior temporal plate of the posterior row. 
Posterior temporals as well us the occipitals to which they are 
contiguous are smooth on all 13 specimens. Upper labials 8, 4th. 
in contact with the eye, excepting specimens n.ºs 271, 455, 1.641 
and 272 which have 9 on the right, the 5 th. being in contact 
With the eye (in n.º 262 the 4th. and 5th.). Four lower labials 
m contact with the anterior chin-shields, excepting specimens n.ºs 
1.397, 271, 1.627, 1.641 and 1.398 in which there are 5 contiguous 
to the anterior chin-shields which are, im turn, as long as the 
posterior in the majority of specimens: n.ºs 1.398, 1.391, 1.397, 
271, 455, 1.627, 272 and 273. AM have convex head plates with 
deep sutures. Scales according to those of the type. Coloration 
practically the same in all, there being some differencê only in 
the intensity of the hlotches. Dimensions and habitat in accord 
with the annexed table. 
