1916] HolUger: Anatomical Adaptations in the Pocket Gopher 455 



scapula may be called the coracoid, and the caudal the glenoid 

 border. The coraco-vertebral angle is well rounded, while the gleno- 

 vertebral angle is acute. The flat, central part of the bone is very- 

 thin in places, but a thickened border extends all around its edges. 

 The spine arises along the lon'g axis of the bone, dividing its lateral 

 surface into two concave areas, the supraspinous and the infra- 

 spinous fossae. The mesial surface of the scapula is divided into 

 three concave areas by two longitudinal ridges which correspond to 

 the two concavities on the lateral surface (fig. B). These ridges 



hd. 



gr. tub. 



del. rg. 



-del. tub. 



gr. tub.-- 



del. tub.- 



ex. con.— 



■ cap. 

 -tro. 



ex. con. 



cap . - ' 



Fig. F. Lateral view of right humerus of the gopher, X 2§ 

 Fig. G. Anterior view of right humerus of the gopher, X 2§ 

 Mc. gv. — bicipital groove lid. — head 



cap. — capitellum in. con. — internal condyle 



del. rgf.— deltoid ridge les. tub. — lesser tuberosity 



del. tub. — deltoid tuberosity rad. fos. — radial fossa 



ex. con. — external condyle tro. — trochlea 



gr. tub. — greater tuberosity 



strengthen the bone, and provide additional surface for the attach- 

 ment of the subscapulars muscle. The spinous process is very high 

 (sp., fig. D). It gradually increases in height from the vertebral 

 border, and reaches its highest point about the middle of the length 

 of the bone. The base of the spine extends down to the neck, while 

 the acromion process reaches nearly as low as the tip of the coracoid 

 process. The end of the acromion is in close relation with the 

 greater tuberosity of the humerus. No metacromion is apparent in 

 the gopher. 



