Osgood — Status of Sorex merriami. 53 



Skull and teeth. — Much as in Sorex merriami, l)ut slightly larger; 

 braincase decidedly deeper, not abruptly elevated, but sloping gradually 

 upward in the plane from the anterior nares to the supraoccipital ; palate 

 broad and sub-triangular, with scarcely any deflection of its boundaries 

 between the unicuspid and the molariform series; second unieuspid 

 largest; third decidedly larger than fourth, its apex slightly inclined 

 backward; fifth unicuspid unpigmented, small, wide and antero-poster- 

 iorly compressed; first four unicuspids relatively high and laterally com- 

 pressed, lacking an inner lateral cusplet or pigmented ridge from apex to 

 cingulum (in this respect, agreeing closely with ,S'. richnrdsoni); inferior 

 cusps of middle upper incisors small; first mandibular incisor with 

 inferior cusps much reduced, scarcely more than slight undulations; 

 third lower incisor rather high and narrow, with its posterior secondary 

 cusp reduced. 



Measureinenfx.—TyY^i.': Total length, 107; tail vertebrae, 88; hind foot, 

 12.5. Skull: (ireatest length, 17.2; greatest breadth of braincase, 8.4; 

 interorbital bri'adth, 3.7; length of bony palate, 7; postpalatal length, 

 7.5; greatest width between outer sides of last upper molars, 5.2; length 

 of maxillary toothrow, 7.4. 



