218 
MR. W. T. 6LANFORD ON REITILES 
[Feb. 
biting longitudinal bands. It. may be romarked tbat tlie distribtj- 
tion of colour appears to be very charftcteristic of the different forms 
of CyUndrophis, But tliere are also structural peeuliaritics by 
wbicli tbe present form ia separated from all previously described . 
In the comtnon species, rujvst all tlie head-shields are propor- 
tionally shorter, the frontals are broader than long, and the distance 
between the eyea more than the length of the snout. The ventral 
shields also are considerably less developed. 
In C. melamnotus the vertical is still longer than in C. lineatm, 
the sides of that shield behind the lateral angles converging much 
less rapidly, and the occipital s are mtich smaller, each being barely 
half the size of the vertical. The coloration, too, is quite different, 
the back being uniformly dark brown. 
In O. macidatns, the only other species known, the vertical, as in 
0, 7neIanonotnSj is bell-shaped instead of subtrapezoidal, and the 
occipital 8 are proportionally larger, being equal to (he vertical in 
size; the frontals are sonietimces longer than the vertical. The 
dorsal coloration coni^i?>ts of two rows of large pale spots, one on 
each aide of the median dorsal line, the intervening space being dark 
brown. 
Tlie different species of the genus may be thus differentiated : — 
A. The width between the eyes is more than the distance from the 
eye to the end of the snout. 
1 . Cylindrophis rufus. Back dark, with imperfect pale rings. 
2. C. fiielanomius. Back uniformly dark-coloured. 
B, The width between the eyes is equal to the distance from the 
eye to the end of tbe snout. 
3. 0* maculahis. Back with large pale spots on a dark ground. 
4. 0. lin&atus. Back longitudinally banded. 
O^CYCALAMtfg LONGICGFS. 
Calamaria longkeps^ Cantor, J, A, 8, B, 1847, xvi. p. 910, pi. x!. 
% 1. 
Ojj^ca/flfWMjJ /ow^jeeps, Giinther, Kept. Brit. India, p. 199; Sto- 
liczka, J, A. S.B, 18/3, slii. pt.2, p. 120. 
Two specimens of this Snake are sent ; they measure 6| and 
7 inches respectively. The nasal shield is single, as noted by Cantor 
and Stoliczka ; but it is divided by a suture below the nostril. Veu- 
trals 143 in one, 1*28 in the other, aubcandals 10 and 25 pairs. 
Both specimens have an imperfect pale collar a little behind the 
head ; and one lias a light spot on the hinder part of the fifth labial, 
extending to the occipital shield. Similar coloration is noted by 
Stoliczkii in a Penang specimen. 
SiMOTKs DENNYSi, &p. nov. (Platc XXI. fig. 1.) 
Scales in 2 1 rows. General form stout and short, as in S* cochin- 
chinensis ^ and ;S'. catenifer^ \ the head broader than the neck. 
1 Gilnther. Bcpl. BHt. Ind. p- 2\% pL x%. %. C. 
» Stolienka, J, A. S. B. 1873, ilii. p«. % p. 121, pi. li. fig. 
