582 



TEE BOX TORTOISES OF NORTH AMERICA— TAYLOR. vol.xvii. 



Quadrato-jugal eutirely absent, and hence zygomatic arch never 

 present. Postorbital arch mnch more slender than in other species. 

 Maxilh^ notched. Cervicals and their processes relatively very short. 

 Upper branch of the scapnla of the same length as the inner branch 

 (endoscapula). Digits without distinct webs. Number of phalanges 

 in forelimb, 2-2-2-2-2; hind limb, 2-3-3-3-1. Number of claws in the 

 hind foot, 4. 



Carapace in horizontal outline broadly oval: nuich compressed above; 

 medium ridge usually present, but the keel always absent, even in the 

 young. Interpleural foramina", between the ribs of the first and second 

 dorsal vertebra? almost obsolete. Ratio of the width to the length of 

 the carapace in adults, never exceeding ten to twelve, rarely more than 

 ten to eleven. The depression of the carapace is usually so great as to 

 render the outline of a transverse section almost oblong in shape. 



The ground color of the carai)ace varies from very dark-brown, 

 marked with bright-yellow radiating lines with a yellow medium line, 

 to very light colors with no markings. Third vertebral jilate less than 

 two-thirds as long as wide, being in all other species relatively longer. 



Plastron widest across the abdominal plates. Ground color brown, 

 marked by irregular yellow lines. Posterior to the hinge ligament 

 these lines sliow a tendency to become longitndinal, while on the 

 anterior of the hinge ligament these lines are mostly transverse. 



East of the Rocky Mountains to Wisconsin, eastern Illinois, central 

 Indian Territory, and eastern Texas. 



List of specimens. 



No. 



Collector. 



Dr.G.Baur 



, <lo 



do 



do 



Dr. O. P. Hay 



do 



Prof. T. D. A. Cockerell 



Eoy JR. Larkin 



Prof. J. D. Bruner 



William Lloyd 



do 



Dr. Kennerly 



Prof. H. B. Duncanson 



Hayden 



Keniiicott 



Hayden 



......do 



Bailey 



Juliu.s Hurler 



Palmer 



W.S.Wood 



do 



Dr. Hayden 



Dr. Mever 



Collection. 



Locality. 



No. 16484, U. S. N. M 



No.20959, D.S.N. M 

 No. 52, U. S.N. M ... 



No. 7541, U. S. N. M . 

 No. 7542, U. S. N. M . 

 No. 57, U. S. N. M . . . 



do 



No. 15861, U.S.N. M 

 No. 16491, U. S. N. M 

 No. 7177, D. S. N. M . 

 No. 156, U. S. N. M . . 

 No. 156, U. S. N. M . . 

 U.S.N.M 



Lawrence, Kan.s. 



Indiana (?). 



Kan.sas; Logan County. 



do. 



do. 

 Kansas. 

 Las Cruces, N.Mes. 



do. 

 El Paso, Tex. 

 South of Devil's River, 



Texas. 

 Corpus Christi, Tex. 

 San Antonio to Fort Inge, 



Tex. 

 Peru, Nebr. 

 Sand Hills, Nebraska. 

 Illinois. 

 Yellowstone (River). 



do. 

 Kennedy, Nebr. 

 fit. Louis. Mo. 

 Old Fort Cobb, Okla. 

 Republican River, Nebraska. 



do. 

 Fort Laramie, Wyo. 

 Kankakee, 111. 



GENERAL REMARKS. 



The geographical distribution of Terrapene offers many interesting 

 phases for study. The relatively fixed habits of the species of the genus 

 render their variations more or less local in character. Good illustra- 



