82 



Eutaeuia marciaua (exteuds W.). 

 Tropidonotus clarkii. 

 Tropidoiiotus sipedon w oodhousei. 



Lacertilia. 



Holbrookia texana. 

 Phryuosoma cornutum. 



Testudinata. 

 Aspidonectes emoryi. 



VI. — THE EASTERN REGION. 



This fauna presents four districts, viz, the Carolinian ; the Alieghe 

 nian : the Canadian ; and the Hudsoniau. These are distinguished by 

 the ranges of mammals and reptiles, and the breeding-places of birds. 

 The Carolinian fauna extends in a belt north of the Louisianiau, and 

 south of tbe isothermal of 71°. Its northern boundary is said to extend 

 from Long Island, south of the hill-region of New Jersey, to the south- 

 eastern corner of Pennsylvania, and thence inland. It embraces a wide 

 belt in Maryland and Virginia, and all of central North Carolina, and 

 then narrows very much in passing round south of the Alleghenies of 

 Georgia. It extends north again, occupying East Tennessee, West Vir- 

 ginia, Kentucky, Indiana, the greater parts of Illinois and Ohio, and 

 the southern border of Michigan. It includes also Southern Wisconsin 

 and Minnesota, all of Iowa, and the greater part of Missouri. The 

 Alleghanian embraces the States north of the line just described, 

 excepting the regions pertaining to the Canadian fauna, which I now 

 describe. This includes Northern Maine, New Hampshire, and Vermont, 

 with the Green Mountains ; the Adirondacks and summits of the Alleg- 

 hany Mountains as far as Georgia. It includes Canada East and north 

 of the lakes. The Hudsonian fauna is entirely north of the isothermal 

 of 50°. It has great extent west of Hudson's Bay, and is narrowed 

 southeastward to Newfoundland. 



VI*. Species peculiar to the Eastern region — 34 : 



Profeida. 

 Necturus lateralis. 



Caducibranchiata. 



Menopoma fuscum. 

 Amblystoma bicolor. 



