—_— a oe 
SPECIES OF NORTH AMERICAN SERPENTS. 21 
8. Coluber Charina Botte, Gray. (Boide.) California. 
9. Ophthalmidion longissimum, Dum. & Bibr. (Typhlo- 
pide.) Florida. 
These 37 genera, composed of 128 species, are embraced 
under 4 family groups, with the following specific and dis- 
tinguishing characteristics, viz. : 
Faminy I—CROTALIDZ. Erectible poison-fangs in 
front. Jew teeth in upper jaw. A deep pit between eye and 
nostril. 
Famity I1.—COLUBRIDZE. Both jaws fully provided 
with teeth. No anal appendages. 
A. Loreal and anteorbital shields both present. 
B. Either loreals or anteorbitals absent. 
Famity IIJ.—BOIDZ. Both jaws with teeth. Rudi- 
ments of hinder limbs, or spur-like anal appendages. 
Famity IV.—TYPHLOPID. Teeth only in one jaw, 
either the upper or lower. Upper jaw prominently project- 
ing. Scales on the belly instead of scutellee (scuta?), dis- 
posed in several series, like those on the dorsum. 
Famity I comprises Genera Nos. 1 to 4, inclusive. 
II comprises Genera Nos. 5 to 33, inclusive. 
III comprises Genera Nos. 34 and 35. 
IV comprises Genera Nos. 36 and 37. 
Few of the preceding species are included in Giinther’s 
-classification, but more are referred to in descriptions of species 
in this work. 
The classification just mentioned embraces only 21 genera, 
which are composed of 109 species, and is as follows, viz. : 
