AND ON iELUKOSATJKUS FELINUS. 



263 



canines. From its fore border, formed by the incisive alveoli, it slopes 

 downward and backward, curving more directly backward where it 

 terminates below. All trace of a median symphysial suture is obli- 

 terated. The breadth of the mandible where the rami diverge from 

 the symphysis is 20 millim. The preserved length of the mandible 

 is 3 inches 3 lines ; and this was probably that, or nearly that, of 

 the skull. 



The suture between the maxillary (ib. fig. 1, 21) and malar (26) is 

 distinct, and shows the slender pointed hind end of the maxillary 

 terminating below the middle of the orbit, the lower or malar 

 boundary of which is here 8 millim. in depth. 



Before the vertical parallel of the hind border of the orbit is 

 reached, the malar abruptly descends (ib. fig. 1, 26) at almost a right 

 angle to near the lower border of a deflected part of the mandible. 

 This descending part of the malar is broken off on the left side 

 (ib. fig. 3); and the mandibular depression which received it is there 

 exposed. 



The mandibular ramus continued backward from the symphysis 

 is subcompressed, 12 millim. in depth beneath the middle of the 

 molar series, thence rapidly gaining depth, especially by a descent 

 and slight inflection of the lower border ; the corresponding rise of 

 the coronoid plate is concealed by the malar. At the part where 

 the vertical extension of the mandibular ramus begins there is a low 

 tuberous outswelling of the external surface, behind which that 

 surface gradually sinks and describes a moderate concavity to the 

 angle of the jaw. 



A suture indicative of angular and surangular is not visible, 

 but that dividing such elements of the mandible from the dentary 

 one is manifest, as is also, along the lower narrow border 

 of the ramus (ib. fig. 3) the suture between the splenial and 

 dentary, showing the splenial to contribute to the hind part of the 

 large and strong symphysis (s) supporting the lower incisors and 

 canines. 



The upper incisors (PI. IX.figs. 1 & 3, i 1-5) are ten in number, 

 five in each premaxillary, arranged in a semicircle or part of a 

 broad ellipse (fig. 3, i). The bases of the crowns are in contact, 

 save between the outermost and next tooth in advance. 



There is but little difference in size ; the first and last in each 

 premaxillary are the narrowest, the second and third the broadest; 

 the exserted crown is best preserved in the fourth and fifth of the 

 right side (fig. 1), and in the fifth of the left side, the basal breadth 

 being 2^ millim., the length about 10 millim. ; they all appear 

 to have had the same simple laniariform character. When entire 

 they passed in front of and covered or concealed the crowns of the 

 lower incisors, the base of one of which is exposed behind the frac- 

 tured crown of its homotype above. 



After an interval of 8 millim. extent the crown of the upper 

 canine (ib. c) extends downward, and with a feeble curve backward, 

 along a depression of like size and shape on the outer surface of the 

 mandible, which gains breadth for the socket of the lower canine 



t 2 



