86 THE NATURAL HISTOEY EEYIEW. 



siderable distance inwards. A faint ridge passes from the summit 

 of the anterior blade to the interspace between the inner of the two 

 above-mentioned cusps and the inner tubercle. The anterior por- 

 tion of the crown is supported by a small cylindrical, the inner 

 tubercle by a small incurved fang, oval in section, and lastly the pos- 

 terior portion by a broad stout fang. 



Dm. 3. The tubercular molar is remarkable for its size and strik- 

 ing resemblance to its homologue in H. striata. The crown, trihe- 

 dral in form, with the long base on the anterior aspect, bears on its 

 surface a stout ridge inter-connecting its three angles together. In 

 a specimen from Brixham there is a stout cusp at each angle of the 

 crown, while in that figured (fig. 2) it is only feebly developed in 

 the interior angle, and entirely absent from the exterior. As in 

 the homologous tooth of H. striata, each angle of the crown is sup- 

 ported by a divergent fang, of which the inner is by far the stouter 

 and longer. 



Dr. Buckland (Eeliquise DHuv. 4to. 1820, pi. vi. fig. 26—27), and 

 Cuvier (Ossemens Toss. 4to. pi. 30, fig. 14), figure the isolated tooth. 

 In size, form and implantation, it agrees with M. de Blainville's 

 description and figure of its homologue in H. crocuta.* 



Dm. 1. The first tooth of the lower milk series is trenchant, coni- 

 cal, and slightly incurved. Its anterior base narrower than the 

 posterior, bears a small cusp, while the posterior generally exhibits a 

 slight thickening without the cusp. Sometimes, however, the ac- 

 cessory cusp is developed behind and suppressed before. The crown 

 is supported by two fangs, cylindrical and divaricant, the posterior 

 being by far the stouter. 



Dm. 2. The second lower milk molar consists of a median tren- 

 chant cone and two trenchant accessory cusps divided from it by a 

 cleft. On the inner and posterior side of the posterior accessory 

 cusp is a small ridge that sometimes bears a row of small tubercles. 

 The posterior portion of the tooth overlaps the anterior of the suc- 

 ceeding molar, in the alveolar border. The fangs are two in num- 

 ber, divergent, cylindrical, and sub equal. 



Dm. 3. The third, or the sectorial milk molar, presents a highly 

 carnassial form. The trenchant edges of the two blades are divided 



* Osteogr. Art. Hyena, p. 30, PI. vi. " Elle a en effet trois racines diver- 

 gentes, ime pour chaque angle de la couronne trilobee qui represente assez bien un- 

 triangle rectangle a bords excaves." 



