150 
ON THE PHYSIOGNOMY OP SEEPENTS. 
the head and dorsal ray of a lively brown ; a black stripe 
behind the eye; abdomen convex. S. 178 + 95. From 
Brazil and Surinam, where it forms a variety distinguished 
by a nearly uniform green colour. 
5. Herpetodeyas margaritiferus. Size and form 
those of Fler. Olfersii ; but it has a rather larger head ; 
nineteen rows of scales, feebly carinated, black, with the 
centre blue, and the tip yellow ; summit of the head a 
bright brown; temporal region black. S. 154+115. 
From New Orleans. 
6. Herpetodryas Boddaertii. Nearly allied to Herp. 
Olfersii ; but the abdomen is a little angular, the head more 
depressed, the labial plates more narrow, colour of a 
greenish-grey, or uniform olive. S. 170 + 102. From 
Surinam. 
7. Herpetodryas iESTivus. Distinguished from the 
three preceding species by seventeen rows of lanceolate and 
strongly carinated scales, by a more thin make, and by its 
fine grass-green colour. S. 175 + 130. Inhabits both 
Americas. 
8. Herpetodryas tricolor. Habit of Herp. viridis- 
simus, but of less size ; its head also is shorter, thick at 
the base, and very conical ; the trunk is less high, and the 
frenal plate is wanting; fifteen rows of square smooth 
scales ; occipital plates much developed ; above of an olive 
or brownish green ; a black list passes from the eye to the 
sides of the neck. S. 150+115. Very rare in Java. 
9. Herpetodryas Goudotii. Form very slender ; tail 
extremely delicate ; above yellowish-brown ; on the flanks 
numerous black oblique streaks, produced by the borders 
of the scales ; sides of the abdomen spotted with black, 
which forms a ray on the sides of the tail ; twenty-one 
rows of scales, lanceolate and smooth. S. 186 + 158. 
Country, Isle of Madagascar. 
10. Herpetodryas oxycephalus. Of a very vigorous 
make, and has the habit of a Coluber ; trunk very com- 
pressed and deep ; abdomen strongly angular ; tail long 
and strong ; head acuminated, especially the muzzle ; 
frenal plate small, and very much elongated ; twenty-five 
rows of lanceolate and smooth scales ; green, below yellow, 
