252 Mr. W. E. de Winlon on 



across both bones 5*5 ; across interorbital space at suture of 

 laclir} mills and iroritals 18; intertein| oral constriction 14*6; 

 infraorbital foramen, height 6'5, brearlth 3-7, basal length 51 ; 

 molar series Vd ', diastema 12; mandible, length (bone only), 

 back of incisors to condyle 33'5, to angle 35, to coronoid 21' ; 

 height, standing on table, perpendicularly to coronoid 19, to 

 condyle 17'1. 



Compared with the skull of A. cinereus (measurements of 

 which, so far as it is possible, are given below), the maxillary 

 processes ot the zygomata do not spring out so abruptly, the 

 su])raorbital ledges slightly and gradually narrow jjoste- 

 riorly, with less distinct jirocesses in the tem))oral portion ; 

 the nasals are rather longer ; the posterior portions of the 

 nasals, premaxillary and maxillary processes being subequal 

 in breadth and evenly rounded off, the frontal suture forms a 

 row of even scallojis; the lachrymal bones are rather longer 

 on the frontal surl'ace, the infraorbital foramina are smaller, 

 the molars broader and more rounded, and the incisive 

 foramina smaller. The auditory buUai are rather large. 



A. cinereus^ Thos. — Very few measurements are ])ossible, 

 the skull being very imperfect. Lingtli of nasals 13 millim. ; 

 narrowest breadth 5'7 ; interorbital breadth 16"5 ; inter- 

 temporal constriction 15; infraorbital foramen 6'7x4-2; 

 molar series 13; diastema 12; mandible, iiuier side of back 

 of incisors to condyle 33, to coronoid 26, to angle 33'5. 



Nasals short ; supraorbital ledges not converging from the 

 front, ending posteriorly in well-marked processes; zygomata 

 sjjringing out very abruptly in front ; tiie nasals, which are 

 blunt, barel}' reach back as tar as do the processes of the i)re- 

 maxilla^, and are not quite so broad as these processes, so that 

 the frontal suture has not the scalloped appearance which is 

 so striking a feature in A. Jacksoni. 



As some of the outward characters of this new Anomalurus 

 resemble A. erytlironotiis^ it would le well to mention the 

 most striking difl'eronces between the skulls. The new form 

 differs in the maxillary ]ioition of the zygomata being stronger 

 and the intraorbital foramina snialler; in the longer and 

 narrower processes of the ])rcnu»xilla3, which in A. ert/t/tronotus 

 stop considerably short of the back of the nasals; in the less- 

 developed processes terminating the frontal ledges ; the 

 auditory bulla3 are consiil<;rably larger and rounder ; the 

 molar series longer and the teeth much heavier, 'i he single 

 specimen has no free pterygoid processes, the bones show 

 no sign of fracture, being smoothly rounded off. In the 



