AMPHITHEHIID^. 275 



47752. The nearly entire right ramns of the mandible ; containing 

 {Fig.) all the anterior teeth and the first six true molars ; from 



the Middle Purbeck group of Durdlestone Bay, Swanage, 

 Dorsetshire. This specimen is the type, and is figured by 

 Owen in his ^ Mesozoic Mammalia ' (Mon. Pal. Soc), pi. ii. 

 fig. 1. Owen considers that there should be a seventh 

 tooth behind the sixth true molar. 



BecHes Collection. Purchased, 1876. 



Amblotherium talpoides (Owen ^). 



Syn. Peraspalax talpoides, Owen". 



Apparently agreeing in the structure of the teeth with the 

 preceding species, but of larger size. 

 Hah. Europe (England). 



47738. Part of the right ramus of the mandible, containg pm. 4 and 

 {Fig.) six true molars ; from the Middle Purbeck group of 

 Durdlestone Bay, Swanage, Dorsetshire. This specimen 

 is the type, and is figured by Owen in his * Mesozoic 

 Mammalia ' (Mon. Pal. Soc), pi. ii. fig. 9, under the generic 

 name of Peraspalacc, of which it is the type. 



BecJcles Collection. Purchased, 1876. 



Amblotherium mustelula, Owen ^ 

 Syn. Peralestes {Phase ok stes) longirostris, Owen^ {in parte). 

 Of considerably larger size than A. soricimmi, and furnished 

 with eight lower true molars, which apparently had no inner cusp. 

 There appears no characters by which the mandible figured by Owen 

 under the name of Peralestes {Phascolestes) longirostris can be dis- 

 tinguished from the type specimen of the present species. 

 Hah. Europe (England). 



47753. The nearly entire right ramus of the mandible, showing 

 {Fig.) most of the cheek-teeth in a mutilated condition ; from 



the Middle Purbeck group of Durdlestone Bay, Swanage, 

 Dorsetshire. This specimen is the type, and is figured by 

 Owen in his ' Mesozoic Mammalia ' (Mon. Pal. Soc), pi. ii. 

 fig. 2. BecJcles Collection. Purchased, 1876. 



'47808. The greater part of a slightly deeper left mandibular ramus, 

 which appears specifically identical with the preceding ; 



' Mesozoic MammaHa (Mon. Pal. Soc), p. 40 (1871). — Peraspalax. 

 ^ Log. cit. 

 3 Ibid. p. 31. 

 * Ibid. p. 35. 



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