IIY/I^^NA CROCUTA. 



13 



however, tlic nrcessory cusp is develo|)C(l bcliiiul and suppressed before. The crown is 

 snj)poited by two fangs, cylindrical and divaiicant, the jjosterior being by far tiic 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, tiie posterior 

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



D.m. 3, the milk cariiassial, 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 anteiiorly and obliquely, and two large subequal 

 blades separated from one another !)y a deep and narrow notch. The inner tid)ercle 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 JJi/aiia sfriaia. 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. 3 is a simple conical tooth with two marked accessory cusps, though occa- 

 sionally small cusi)s may be developed at either end of the tooth. 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. 3 consists of a well-marked median cone and two small cusps, one placed 

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

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



D.m. 4 is the carnassial tooth. Ds 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 bilobcd apj)earance. 



(8) Measurements of the Deciduous Teeth. 





Upper. 



Teeth in frap^ment of jaw fromCreswell 

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



Teeth in fragment of jaw from 

 Brixham (Brit. Mus.). 



d.m. 2. 



d.m..,. 



d.m. 4. 



d.m. 2. 



d.m. 3. 



djn. 4^ 



Maximiini antero-posterior measurement ... 



Maximum transverse measurement of crown 



Measurement from notch between roots to 

 top of crown 



1-5 

 OG 



0-75 



2-2 



0-75 



0-9 



0. 

 1-4 



0-7 



2 2 



0-8 



... 



08 

 1-35 





