﻿HY/ENA CROCUTA. 



13 



however, the accessory cusp is developed behind and suppressed before. The crown is 

 supported by two fangs, cylindrical and divarieant, the posterior being by far the stouter." 



D.m. 2 is a simple conical tooth with no marked accessory cusps. The base is 

 slightly wider posteriorly than anteriorly. There are two strong roots, the posterior 

 being the larger. They do not diverge so much as do those of d.m. 1. 



D.m. 3, the milk carnassial, has much the same general form as the permanent 

 carnassial, and consists of a long sectorial portion and an inner tubercle. The sectorial 

 portion shows two small cusps placed anteriorly and obliquely, and two large subequal 

 blades separated from one another by a deep and narrow notch. The inner tubercle which 

 arises from the anterior half of the blade is low, but extends a long way inwards. 

 There are three roots, a small one supporting the inner tubercle, and two large divergent 

 ones supporting the main part of the tooth. 



D.m. 4, as noted by Dawkins, is remarkable for its size, and its resemblance to m. 1 

 in Hyaena striata. Its crown is shaped like an isosceles triangle with a broad forwardly 

 directed base. The three angles are connected by a stout ridge, and each is supported 

 by a divergent root. 



D.m. 2 is a simple conical tooth with two marked accessory cusps, though occa- 

 sionally small cusps may be developed at either end of the toolh. The base of the 

 crown is wider posteriorly than anteriorly, and of the two roots, which diverge strongly, 

 the posterior is the thicker. 



D.m. o consists of a well-marked median cone and two small cusps, one placed 

 antero-internally, the other posteriorly. On the inner side of the posterior cu>p is a 

 small accessory ridge. There are two divergent cylindrical subequal roots. 



D.m. 4 is the carnassial tooth. Its cutting edge is divided into two subequal 

 blades separated from one another by a cleft. Separated from the posterior blade by a 

 well-marked groove is a large tubercle which usually shows indistinct division into three 

 little cusps. Boyd Dawkins notes that occasionally all three cusps are suppressed, and 

 the ridge which takes their place is cleft posteriorly, giving the tubercular portion a 

 slightly bilobed appearance. 



(8) Measurements op the Deciduous Teeth. 





Upper. 



Teeth in fragment of jaw fromOreswell 

 Cave, figured in PI. V, figs. 3 and 4. 



Teeth in fragment of jaw from 

 Brixham (Brit. Mus.). 



d.m. 2. 



d.m. 3. 



d.m. 4. 



d.m. 2. 



d.m. 3. 



d.m. 4. 



Maximum antoro-posterior measurement ... 

 Maximum transverse measurement of crown 

 Measurement from notch between roots to 



1-5 

 0-6 



0-75 



22 



0-75 



0-9 



0-8 

 1-4 



1-15 



0-7 



2-2 

 08 



0-8 

 135 





