INSECTIVORA. 199 



outwards and forwards. First premolar small, filling the short space 

 between the second and the canine No cingula; enamel obscurely 

 plicate, ramus robust. Length of inferior molars minus the last .0-465; 

 length of base of first true molar, .010; width of do. .009; elevation 

 of crown do. .0055; length of base of fourth premolar .011; width of do. 

 .008 ; elevation of crown of do. .0065. Anteroposterior diameter of base of 

 crown of canine .010. Depth of ramus at first true molar .023; width of 

 do. at do. .013. This genus differs from EstJionyx in the form of the fourth 

 premolar. In the latter the anterior lobe is compressed and trenchant. The 

 species is larger than any of that genus, and nearly equal to the Edoganus 

 gliriformis. 



Since the preceding was written, I have received Yrom the same region 

 a much more complete specimen. It includes the greater part of the den- 

 tition of both jaws, with mandibles, parts of cranium, limbs, etc. 



The mandible shows that the first true molar is the largest tooth, and 

 that the crowns diminish in size in both directions. The third premolar has 

 a nearly regular conic crown, with an oblique anteroposterior diameter a 

 little the longer. Each of the preceding premolars has a single root. The 

 inferior canines are very robust, and their crowns are strongly recurved. 

 The external incisor is of good proportions, while the interior incisors are 

 only half as large. The ramus is robust, and the symphysis is coossified. 

 The inferior border of the ramus is slightly convex, and then rises, to the 

 angle, commencing below the last molar. The angle is I'ounded, and is 

 quite prominent, the posterior border being strongly incurved below the 

 condyle. The latter is situated in the plane of the grinding surfaces of the 

 molars. Its articular surface presents equally superiorl}^ and posteriorly. 

 The edge of the angle is incurved, and rises as a support to the internal 

 extremity of the condyle. The corouoid process rises immediately in ad- 

 vance of the condyle, and its base has a wide anteroposterior extent; apex 

 lost. The masseteric fossa is deeply impressed, but has no distinct inferior 

 boundary. The anterior border is prominent, forming a flattened front of 

 the process, which is oblique, projecting forwards as well as outwards. The 

 ridge extends to below the anterior lobe of the last molar. On the inner 

 side of the angular region there are four ridges for the insertion of the 



