INNOCUOUS SERPENTS. 
167 
white spots. S. 146 + 61. From Malabar to the Pe- 
ninsula of Malacca ; also inhabits the Philippine Isles. 
12. Tropidonotus vittatus. Abounds in the inun- 
dated parts of the Island of Java. Size and form nearly 
as the preceding. Livid brown, relieved by three black 
rays ; a ray of pale red on the last row of scales. S, 
144 + 76. Of a slate-blue, bordered with black. 
13. Tropidonotus schIstosus. Above of a slate- 
grey ; below yellowish ; size less than that of the T. 
Natrix ; head short and conical, with aggregated plates ; 
eyes small ; scales surmounted by a very strong carina. 
S. 150 -f- 80. Observed in Madagascar, Bengal, and the 
Philippines. 
14. Tropidonotus bipunctatus. In many respects 
resembles our T. Natrix, especially the variety of South- 
ern Europe ; but it has a more lengthened head ; the 
eyes are smaller, the collar and the spot on the neck are 
wanting. Above marked by irregular transverse spots. 
Abdominal plates have a black spot. S. 141 + 67. Coun- 
try, Martinique, Florida, Carolina, Mexico, &c. 
15. Tropidonotus Saurita. In colour and physiog- 
nomy it presents a striking analogy with, the preceding ; 
but differs from it, as from all the others of the genus, by 
its slender form, which approaches to that of the Herpe- 
todryas ; head more elongated than ordinary. Ground 
colour a deep brown, relieved by longitudinal rays ol 
black. S. 166 + 111. Country, North America and Mar- 
tinique. 
16. Tropidonotus pasciatus. Attains a very large 
size. Head a little more than usually elongated ; scales 
strongly carinated ; eye rather large ; nostrils narrow, 
and almost vertical. S. 136 + 65. Greyish-brown, re- 
lieved by deep, broad, round spots, which are often con- 
fluent ; yellow below. Inhabits the same countries as 
the two preceding. 
17. Tropidonotus viperinus, of the south of 
Europe, is found in the Barbary States, and even as far 
as the Caspian Sea. Head more lengthened than in the 
other species ; very conical, and covered with more nar- 
row plates. Above of a brownish-green, marked with 
