NEVrRAVID^. • 977 



men. The oval / lachrymah is of medium size. The / opticum is far pos- 

 terior and close to the / sphenodrbitale, which has twice its vertical diameter. 

 On account of the early connection between the temporal and pterygoid 

 parts of the sphenoid, the / sphenodrbitale and rotundum are thrown together 

 and forwards. They are, however, completely divided. A narrow alisphe- 

 noid canal enters the / rotundum from behind, connecting it with the / 

 ovale. The / ovale is large and transverse. The / lacerum anterius is sub- 

 round and rather large. The / postglenoideum is rather small, and is in the 

 anterior wall of the meatus auditorius externus. On the posterior border of 

 the bulla otica are two foramina; an external lai-ger, and an internal smaller. 

 The latter occupies the usual position of the jugular foramen, but is proba- 

 bly the / cnrotideuni. The other may have carried a branch of the jugular 

 vein, although it is in the position of the stylomastoid foramen. The ante- 

 rior condylar foramen is small, and is situated far posterior to the two 

 foramina '«just mentioned. A small foramen just above the paroccipital 

 process I suspect to be the mastoid. The postparietal foramen is large, and 

 is situated below the middle of the parietal bone. The / magnum is wider 

 than deep, and has a i-egularly arched superior border, without tuberosities. 

 Dentition. — The superior canine is quite long, and has a regularly lentic- 

 ular section, without facets. Its anterior and posterior edges are denticu- 

 late. The external incisors are much larger than the internal, and have 

 subconic crowns. The crowns of the others are subcuneiform. The first 

 superior premolar is very small, much less developed than in D. felina. 

 I originally described it as having one root, but there are indications of a 

 second in an obsolete alveolus, filled partly by bone and partly by remains 

 of the root. The tooth is lost from both sides of the specimen. The second 

 premolar has a distinct anterior tubercle on the inner side, a character not 

 seen in D. felina; the anterior angle of the sup,erior sectorial is more pro- 

 duced than in that species. The crown of the supjerior tubercular looks 

 partly inwards, is rather long, and has three roots. The inferior canines 

 are considerably larger than the incisors. The latter are regular, and do 

 not overlap each other. The second and third inferior premolars have well- 

 developed basal lobes anteriorly and posteriorly. The heel of the sectorial 



is well developed. The tubercular is very small, and has a semiglobular 

 m c 



