24 



IXSECTIVORA 



longitudinal diameter about equal to width of palate in same 

 region. Posterior palatal ridge much as in TaJpa, but the 

 extremities produced as distinct backward-curved processes. 

 Mandible lather robust, the ramus neai'ly straight, the angular 

 I^rocess much below alveolar line Coronoid process high and 

 narrow, slightly recurved at tip, its height above alveolar line 

 considerabl)' greater than least breadth of posterior segment of 

 mandible. Articular process short and robust, the single 

 articular surface rather large, normal in position. Angular 

 process longer than articular process, its form essentially as 

 in Talpa. 



Teeth. — Dentition relatively heavier than in Talpa euro-psea, 

 the teeth, with exception of anterior upper incisors, less trenchant 



in general aspect. An- 

 terior upper incisor much 

 the largest of all the 

 teeth, the two together 

 closing entire front of 

 palate ; shaft triangular 

 in cross section, and all 

 three faces sub-triangular 

 in outline, the posterior 

 and antero-external faces 

 widest, the former slightly 

 concave, the latter 

 slightly convex, the two 

 forming a perpendicular 

 external cutting edge 

 about 4 mm. in length 

 along their line of con- 

 tact ; a much shorter but 

 well developed cutting 

 edge along line of contact 

 of posterior and antero- 

 internal faces, extending 

 from acutely triangular- 

 pointed apex of tooth to 

 point of contact with 

 tooth of opposite side, 

 a distance of about 

 ■ 6 mm. ; line of contact 

 between antero-external 

 and anterointernal faces 

 marked by a slight thougli evident ridge ; height of shaft 

 about equal to width of palate ; tirst and second lower incisors 

 small, chisel-shaped, strongly imbricated, the second about 

 twice as large as first, their shafts directed forward in line 

 with upper portion of symphysis menti, the tips of the four 

 teeth together forminsc a straio;ht transverse cutting edge which 



Fig. 6. 

 Galemys j'urenaicus. 



