260 MAESTJPIALIA. 



malia,' pi. iv. figs. 7, 8 ; it shows the third incisor, the 

 canine, the first three premolars, mm. 4, m. 1 and m. 2, the 

 impress of m. 3 on the limestone, and m. 4 on the inner 

 side of the coronoid process. Since the specimen was 

 figured, the outer lamina of the ramus has been cut away 

 to exhibit the germ of pm. 4 in alveolo. The length of i^TT 

 + ^72 is 0,005, and that of ^71 + ^^2 + ^Ts 0,008. The 

 position of m, 4 on the inner side of the coronoid indicates 

 that this tooth may be present in No. 47766. 



BecJcles Collection, Purchased, 1876. 



48395. The imperfect mandible of an immature individual, appar- 

 ently showing pm.2, pm. 3, mm. 4, m. 1, and i^72. 



Same history/. 



The foUoiving specimens not improbably belong to this species. 



47771. Part of a right mandibular ramus, containing three true 



{Fig.) molars. Figured by Owen, op. cit. pi. iv. fig. 6 (as T. (?) 



minor). Same history. 



47784. Fragment of the right maxilla, containing the last true 

 {Fig.) molar. Figured by Owen, op. cit. pi. iv. fig. 5. 



Same history. 



47768. Fragment of the right mandibular ramus of an immature 

 {Fig.) individual, showing ^^74 half protruded from its alveolus 



and the imperfect iKTl and ^^2- Figured by Owen, op. 



cit. pi. iii. fig. 15. Same history. 



Triconodon ferox, Owen \ 



Syn. (?) Triconodon occisor, Owen ^. 



Distinguished from the preceding species by its superior size and 

 the contour of the angle of the mandible. None of the specimens 

 show any trace of ^^^4. The length of ^Tl + m^^ in the type 

 specimen is 0,008, and that of m7\ + mr2 + raTs 0,013. 



Hab. Europe (England). 



The folloiving specimens were obtained from the Middle Purbeck 

 group of Durdlestone Bay, Swanage, Dorsetshire. 



47775. The nearly entire left ramus of the mandible, containing 

 {Fig.) the canine, the broken base of ^^TI, the remaining three 



^ Mesozoic Mammalia (Mon. Pal. Soc), p. 64 (1871). 

 '' Ibid. p. 69. 



