420 Dr. A. Giinther on new Species of Snakes 
Herpetodryas occipitalis. 
Similar to Herpetodryas Rappti. Habit moderately slender. 
Eyes large. Shields of the head normal; eight upper labials, 
the third, fourth, and fifth entering the orbit ; Loreal nearly as 
high as long; preeocular reaching to the upper surface of the 
head, but not extending to the vertical; lateral edges of the 
vertical nearly parallel; occipitals subtruncated behind. Two 
or three postoculars; temporals 2+2. ‘There are four lower 
labials in contact with the front chin-shields, which are three- 
fifths as long as the posterior. 
Scales smooth, in fifteen rows. Ventrals 175; anal entire ; 
subcaudals 96. 
Upper parts brownish black, with narrow greyish transverse 
lines, separated from one another by five or six transverse 
series of scales; a broad white band across the occipitals, ex- 
tending behind the orbit to the posterior labials; hind margin 
of each labial black; ventrals pearl-coloured, marbled with 
_ black on the sides. 
A specimen, 14 inches long, has been obtained by Mr. 
Hauxwell at Pebas. Head 6 lines, tail 34 inches. 
Tropidonotus Swinhonis. Pl. XIX. fig. F. 
Head rather narrow and elongate; trunk rather slender. 
Eye of moderate size. Scales in fifteen rows. Ventrals 150 ; 
anal bifid; subcaudals between 50 and 60. Anterior frontals 
rounded in front, half as large as posterior ; occipitals obliquely 
truncated behind, longer than vertical ; loreal as deep as long ; 
one preocular, reaching to the upper surface of the head ; three 
postoculars. Six upper labial shields, the third and fourth 
entering the orbit, the fifth very long, nearly as long as the 
three preceding ones together; temporals 1+2, the anterior 
rather elongate, in contact with the two lower postorbitals. 
Dentition diacranterian. 
Upper parts nearly uniform olive-brown, anteriorly with a 
few indistinct and irregular blackish spots. Neck reddish | 
olive, with a broad ‘late collar: a oe blackish spot below 
the eye, and an oblique blackish band across the temporal 
region. Lower parts uniform whitish, slightly and finely 
marbled on the side. 
Formosa. A single specimen, 25 inches long, has been 
obtained by Consul Swinhoe. Head 9 lines long, tail 5 inches. 
Tropidonotus punctulatus (Gthr.). 
This snake proves to be a native of Pegu, whence specimens 
were brought by Mr. Theobald. 
