112 Dr. C. W. Andreics — Notes on Efn/pfian Eocene Mamninh.- 



Among the specimens collected by me last season is a portion of 

 the right ramus of a mandible containing the three molax's : of these 

 m. 3 is in perfect and unworn condition, while m. 2 and m. 1 have 

 lost portions of their outer sides. The character of the teeth here 

 preserved proves the existence in these beds of another small 

 proboscidean related to Mceritherinm, but differing from it so con- 

 sideraldy that when better known it may be necessary to refer it to 

 a new genus; for the present it may be called Moerilherium trigodon. 



The characters of the teeth are as follows : — 



M. 1 was a bilophodont tooth with a small posterior lobe ; each 

 transverse crest consisted of two tubercles. Most of the outer half 

 of the tooth is wanting; the inner half consists of a high anterior 

 cusp and a somewhat lower posterior one, separated by a deep 

 valley. The half of the posterior lobe still remaining is nearly flat. 



M. 2 also wants a great part of its inner half. It is similar to 

 m. 1, except that the posterior lobe bears a large blunt tubercle, 

 which lies immediately behind the outer tubercle of the posterior 

 crest. These two teeth are very similar to the corresponding ones 

 of Mosritherium. 



M. 3 is quite unworn ; it differs widely from m. 3 of Moeritheriitm. 

 Like the other molars, it consists of two transverse ridges and 

 a talon. The transverse ridges are placed somewhat obliquely ; the 

 anterior one consists of a high pointed outer tubercle and an inner 

 one, on the outer face of which a small secondary tubercle is present. 

 In the posterior crest the outer lobe again consists of a pointed 

 tubercle, but the inner half is formed by two subequal tubercles. 

 The talon is composed of a large tubercle in the same antero- 

 posterior line as the outer cusps of the crests, and on its inner side 

 there are several small tubercles ; on its outer side the cingulum is 

 well developed. The talon as a whole is thus triangular in outline, 

 its posterior angle being on the outer side of the tooth. In 

 Mceritherinm lijonsi, on the other hand, the talon is much broader, 

 and consists of an outer and an inner tubercle, which form a third 

 transverse crest, thus converting the tooth into a trilophodont one. 

 This difference in the talons appears to justify the separation of the 

 present form as a distinct species at least, and, as already remarked, 

 further material will probably show that a new genus will have to 

 be established. The enamel of the whole tooth is raised into 

 irregular ridges and small tuberosities. 



The dimensions of the specimen are : — 



Length. Breadth. 



ni. 1 26 mm ? 



m. 2 ... ... 32mm. ... ... ? 



m. 3 40 mm 24 mm. 



Falceomasiodon. 



The structure of the skull in this genus is now almost completely 

 known. The most complete specimens yet found are (1) an adult 

 skull wanting part of the occipital and most of the facial regions; 

 (2) the anterior half of a young skull collected by Mr. Beadnell, and 



