TESTUDINATA : CINOSTERNOID^. 289 



The Genus Emys contains Blanding's Tortoise, E. 

 mekagris, Ag., Cistuda Blandingii, Holbr., from New 

 England to Wisconsin, which has the shell about eight 

 inches long, color black, with numerous yellow spots. 



The Genus Nanemys contains the Speckled Tortoise, 

 N. guttata, Ag., of North America east of the Rocky 

 Mountains, which has the shell four and a half inches 

 long, black, dotted with orange ; and Calemys, Miihlen- 

 berg's Tortoise, C. Mnhknbergii, Ag., of the Middle States, 

 which has the shell about four inches long, dark, and an 

 orange patch on each side of the neck. 



The Genus Glyptcmys contains the Wood Tortoise 

 (Fig. 152), G. insculpta, Ag., E. insculpta, Lee., of the 

 Northern States, which has the shell about eight inches 

 long, and presenting a beautifully carved appearance. It 

 is found in woods and fields. 



The Genus Actineinys contains A. marmorata, the only 

 Emydoid known from the western slope of North Amer- 

 ica. 



Fig. 153. 



The Genus Cistudo contains the 

 Box Turtles, which have the plas- 

 tron composed of two parts that 

 are movable upon one axis, and 

 which can be brought into close 

 contact with the carapace, and 



1 11 i Box Turtle > C - Virginia, Ag. 



thus completely conceal all the 



extremities of the animal. They are found in dry woods. 

 The Common Box Turtle, of the United States, C. vir- 

 ginea, Ag., is about six and a half inches long. 



ClNOSTERNOID^E, OR MUD-TURTLE FAMILY. This 



Family comprises turtles which are long and narrow, and 

 whose average size is less than that of any other family 

 of Testudinata. They are aquatic, but come out of the 

 water to bask in the sunshine, yet remain so near as to drop 

 in on the slightest alarm. They lay three to five hard- 

 13 s 



