v. 



A MONOGRAPHIC STUDY 

 OF THE AMERICAN MARSUPIAL, GENOLESTES. 



BY WILFRED H. OSGOOD. 



CONTENTS. 



PAGE 



Introduction 4 



History 6 



Distribution 15 



Habits 17 



External characters 19 



Measurements 21 



Myology 22 



Muscles of the skin 22 



Muscles of the back 24 



Muscles of the head 30 



Muscles of the neck 32 



Muscles of the thorax 34 



Muscles of the abdomen 35 



Muscles of the sacrum 36 



Muscles of the tail 38 



Muscles of the anterior limb 40 



Muscles of the forefoot 46 



Muscles of the hind limb 47 



Muscles of the hind foot 56 



Summary of myological characters 59 



Urinogenital System 61 



Male organs 62 



Female organs 66 



Alimentary Canal 69 



Glands 73 



Respiratory System 76 



Circulatory System 77 



Skeleton 77 



Cervical vertebrae 77 



Thoracic vertebrae 82 



Lumbar vertebrae 84 



Sacral and caudal vertebrae . 84 



Ribs and sternum 86 



Pectoral girdle 87 



Pelvic girdle 88 



3 



