Feb., 191 2. Mammals of Illinois and Wisconsin — Cory. 



which in any event would require far too much space in a work of this 

 nature. I shall, therefore, discuss briefly only those characters which 

 require explanation, and refer the student to the accompanying charts 

 of skeletons and skulls, the study of which should enable him to learn 

 the names of the most important bones and their relative positions. 



J 



Scapula and clavicle with upper end of ster- 

 num and ribs of Shrew {Sorex), much enlarged. 

 (Adapted from Flower's Osteology.) 



a. Acromion process; b, metacromial process; 

 c, coracoid border; d. "spine" of scapula; 

 e, scapula (includes the entire bone) ; f . clav- 

 icle; g, presternum (upper part of sternum) ; 

 1-2 = sections of ribs. 



Sternum of Man (much reduced), showing 

 sections of ribs on one side. (After Flower.) 



g, Presternum or manubrium sterni; h, 

 mesosternum, body of sternum or gladiolus; 

 i. xiphisternum, xiphoid or ensiform process of 

 sternum; j, point of attachment of clavicle; 

 1-10 = sections of ribs. 



Side view of skull of a Wolf, 

 a. Interparietal; b. sagittal crest; c, parietal; d, squamosal; e, occipital condyle; f, meatus audi- 

 torius extemus; g, auditory bulla; h, zvgoma or zygomatic arch; i, frontal; j, postorbital process of 

 frontal; k, malar or jugal; 1, postglenoid process; m, pterygoid process; n, infraorbital foramen; 

 o, maxilla; p, premaxilla; q, incisors; r, canines; s, premolars; si. carnassial or sectorial tooth; 

 t. molars; ti, carnassial or sectorial tooth; u, mental foramina; v, horizontal ramus of mandible; w, as- 

 cending ramus; x, coronoid process; y, condyle of mandible; z, angular process of mandible. 



