56 PROCEEDINGS OF THE ACADEMY OF [1890. 



1 a r s t r i t u b e r c II 1 a r. L o w e r m o 1 a r s qua d r i t u b ere u- 

 1 a r. Last lower molar with a third lobe. 



Lower jaw. The large incisor of the type species is tricuspid but 

 there is every shade of variation among the specimens to the uni- 

 cuspid incisor found in P. Dauhreei. Behind this tooth is a dias- 

 -p- tema. The premolars consist of a lofty 

 cusp followed by a heel. The molars, ex- 

 cept the last, are distinctly quadritubercu- 

 ar with an occasional trace of the para- 

 Pig I conid. Upper j a w. The enlarged in- 



Plesiadapis(?) Remensis. cigor is followed by a small lateral incisor 



Superior molar series, about . mi i 



3 natural size. ^'^Ci canme. i he last premolar has a 



slightly reduplicate external cusp. In the molars the transverse 

 diameter exceeds the antero-posterior, and as in Anaptomoiyhus the 

 series is decidedly arched, the conules or intermediate tubercles 

 are faintly developed while the hypocone is still a ciugule. 



The skull is short and relatively broad, with a deep, rounded 

 occipital crest. The chin is rounded ; the posterior portion of the 

 jaw is large and deep with a prominent coronoid process. The 

 skeleton is decidedly lemuroid with a freely rotating radius, a 

 third trochanter upon the femur, the tibia arched, the phalanges 

 long and strong, the ungual phalanges flattened and oval at the tip. 



INSECTIVORA. 



Dr. Schlosser (2 p. 47) has pointed out that Achqnsorex and Adapi- 

 soriculus are Insectivora both in tlieir skeletal and dental characters, 

 and has also referred them to a new family, the Adajmoricidte. The 

 humerus is perforated. The femur has a free head and elevated 

 great trochanter. 



ADAPISOREX, Lemoine. 



A. GaitJrvi, Lem. '83b, type species. A. Chcvil!ionei,A. Remensis, A. miniiniis, 

 Lem., '83b.' See also \S5, Plate X. 



Gen. char. : Dentition i^ ci p; m^. Lower m o 1 a r s q u a d r i- 

 t u b e r c u 1 a r. Third molar small and without pos- 

 terior lobe. Lower incisors and canines p r o c u m- 

 b e n t. 



The characters of the lower jaw of this small insectivore indicate 

 clearly its wide separation from the above lemuroids. The jaw is 

 long and slender, sloping to the chin with a weak and pointed coro- 

 noid and angle. The enamel upon the first incisor is banded ; the 

 second incisor is short while the canine is reduced. The premolars 



