NORTH AMERICAN BATRACHIA AND REPTILIA. 
33 
19. C. pygcea, Cope. Postorbitals two; color above black, 
with faint pale lines along the center of each scale on several 
lateral rows; beneath yellowish; tail reddish; dorsal rows 17; G. 
118-122. Florida. 
8. Genus Cemophora, Cope. 
Dentition isodont; rostral acute, produced forward, causing a 
sharply pointed snout; nasals one or two; loral one; anteorbital 
one; postorbitals two; superciliaries small; dorsal scales smooth; 
anal entire; eye small; head subconical, continuous with body. 
20. C. coccinea , Blumenbacli. Superciliaries very narrow; 
upper labials six; body yellowish-red (crimson in life), crossed 
by from 20 to 26 black rings, enclosing yellow ones; beneath 
uniform yellowish-white; dorsal rows 19; G. 160-170. Austro- 
riparian region. 
9. Genus Osceola, B. and G. 
Nasals two; loral absent; postfrontals very large, touching 
upper labials; anteorbital one; postorbitals two; dorsal scales 
smooth; anal entire; eye large; head distinct from slender body. 
21. 0. elapsoidea , (BLolb.) B. and G. Scarlet Snake. Post- 
orbital large, and extending to second upper labial; rostral very 
broad; ground color bright red, fading beneath, annulated by 
about 18 pairs of jet black rings, each enclosing a white one; the 
black rings tapering on the sides, the white ones widening; head 
red, maculated with black; a yellow collar on upper part of neck, 
bordered by black lines; dorsal rows 19; G. 175-180. Virginia 
to Florida; Illinois. 
10. Genus Ophibolus, B. and G. 
Nasals two; loral present; anteorbital one; postorbitals 
two; superciliaries moderate; dorsal scales smooth, scarcely 
overlapping; anal entire; head depressed; body rather thick; 
tail short; eyes small. • 
A. Dorsal rows 21. 
a. Predominating color black. 
22. O. getulus , subsp. getulus , (Linn.) Cope. Chain Snake. 
A series of large black blotches along middle of back, and another 
on each side; these are separated from one another by narrow, 
continuous, yellow lines ; abdomen with central black blotches, 
which are usually confluent with those on sides; G. 210-225. 
East of Alleghanies, from Maryland to Florida and Louisiana. 
