ORDER II. TESTUDINATA 965 



from the other blotches on the same side of the back by about 

 one and one-half scales, and from those of the opposite side 

 by the width of one scale. There are two or three rows 

 of smaller alternating brown spots on the sides. The gas- 

 trosteges, except anteriorly, are dark slate. The edges of 

 the gastrosteges and of the scales of the first row are whitish. 

 The tip of the tail is bright salmon or flesh-color. 



Length to anus 309 319 395 406 445 460 480 



Length of tail to 

 base of rattle ... ..... 32 29 38 41 30 40 43 



Distribution. This beautiful little rattlesnake is known 

 only from southeastern Arizona. It has been taken in the 

 Huachuca Mountains, in Cochise County, and at an altitude 

 of 7,500 feet, on a ridge near Old Baldy, Madera Canyon, 

 Santa Rita Mountains, Santa Cruz County. Another was 

 taken near the summit of Old Baldy. It is said that this 

 species occurs also in the Catalina Mountains. In the Chiri- 

 cahua Mountains it has been collected on Onion Creek near 

 Paradise, Cochise County. The National Museum has it 

 from the Apache Forest, and from 6,100 feet altitude on 

 Ash Creek, Mount Graham. 



Order II. TESTUDINATA 



This order includes all of the turtles. These belong to 

 a number of families, only four of which occur within our 

 geographical limits. Two of these families include the sea 

 turtles, so that our land and fresh water turtles all belong 

 to two families, the Kinosternidce and the Testudinida?. The 

 latter includes most of our species of turtles. These are 

 very few in number. Indeed, throughout most of the area 

 under consideration only one kind of turtle (Clemmys mar- 

 morata) has been found. 



