SPECIES OF NORTH AMERICAN SERPENTS. ay 
8. Coluber Charina Botte. Grey. (Boide.) California. 
9 Ophthalmidion longissimum, Dum. & Bib. (Typhlo- 
pide.) Florida. 
These 37 genera, composed of 125 species, are embraced 
under 4 family greups. with the following specite and dis- 
tinguishing characteristics. viz. : 
Fasmry I—CROTALIDE. Erectible poisen-fings in 
front. Tew teeth in upper jaw. A deep pit between eve and 
nostril. 
Fairy I1—COLUBRID-£. Both jaws fully provided 
with teeth. No anal appendages. 
A. Loreal and anteorbital shields both present. 
B. Either loreals or anteorbitals absent. 
Famiry TII.—BOID_E. Both jaws with teeth. Rudi- 
ments of hinder limbs. or spur-like anal appendages. 
Fairy IV.—TYPHLOPID-E. Teeth only in one jaw. 
either the upper or lower. Upper jaw prominently project- 
ing. Scales’on the belly instead ef seurcile senta?i, dis- 
posed in several series. like these on the dorsum. 
Faxary I comprises Genera Nes. 1 to 4. inclusive. 
II comprises Genera Nos, 5 to 35, inewusive. 
TIT comprisss Genera Nes. 54 and 55. 
IV comprises Genera Nes. 36 and 37. 
Few of the preceding species are included in Giinther’s 
classification, but more are referred to in deseriptions of species 
in this work. 
The elassiteation ‘ust mentioned embraces only 21 zener. 
which are composed of 109 species. and is as tellows, viz. : 
