117 



{Sternum.) 



Sternum with manubrium widest 

 near the middle and more or less 

 keeled ; 



Sternum with manubrium widest 

 towards the front and not at all 

 keeled ; 



with sternebers narrow, and carinate or elevated at the middle. 



{Fore limb.) 



Fore limbs varying greatly, modified more or less in accordance with 

 the more or less fossorial adaptation in the various genera, their primary 

 modifications differentiating into subfamilies (see Talpince and Myoga- 

 lince); radius and ulna always separate ; digits five : 



carpus with no os intermedium. | carpus with an os intermedium. 



HIND LIMB AND APPENDAGES. 



{Pelvis.) 



Pelvis very long and narrow ; the ossa innominata parallel with the 

 vertebral column; the ilia very narrow and anchylosed with the sacrum ; 

 the ischia and pubis parallel, inclosing narrow thyroid foramina, and 

 produced towards their inferior posterior angles ; the pubes more or less 

 widely diverging and separated from each other ; 

 pubes distant in front. | pubes approximated in front. 



{Kind limh.) 



Femur robust, straight, with a large trochanter nearly as termiaal as 

 the articular head, and with a smaller one lower down and near the 

 tuberosities of the distal extremities subequal : 



tibia and fibula wide apart below their heads for the proximal third 

 or half of their length, and soldered together at their distal portions ; 



tibia more or less sigmoidally curved, with its proximal portion com- 

 pressed ; with an anterior triangular, flattened surface widening towards 

 its head, and with an external apophysis or hook ; 



fibula nearly straight, and towards its proximal end sending out crests 

 terminating in hooks or tubercles. 



Pes normally developed; tarsus with the seven ossicles regularly 

 proportioned to each other ; calcaneum with an internodistal apophysis ; 

 astragalus with the articular concavities on the same axis ; scaphoid 

 moderate, normally excavated for the astragalus, and with a large sur- 

 face of attachment for the cuboid ; cuboid elongated ; cuneiforms more 

 or less subequally developed, oblong, and parallel. 



Digits five, normally related to each other. 



VISCERA. 



Intestinal canal with no csecal diverticulum. 



EXTERNAL FEATURES. 



Pelage with fine and soft hair or fur. 



