291 



47762. Part of the left ramus of the mandible, showing all the 

 (Fig.) cheek-teeth ; from the Middle Purbeck group of Durdlestone 

 Bay, Swanage, Dorsetshire. Figured by Owen, in his 

 ' Mesozoic Mammalia' (Mon. Pal. Soc.), pi. iii. fig. 1. 



BecTcles Collection. Purchased, 1876. 



GENUS non det. (Incertce sedis.) 



The following specimens were referred by Owen to Stylodon pusillus. 

 All are from the Middle Purbeck, Durdlestone Bay. 



47786. A small block of Purbeck limestone, containing a fragment 



of a mandibular ramus with teeth, together with part of a 

 right maxilla, with the last nine cheek-teeth. The asso- 

 ciation of these specimens is very strong evidence as to 

 their speci6c identity ; the teeth of the maxilla apparently 

 agree in structure with those of No. 47755, but seem of 

 rather smaller size. 



BecUes Collection. Purchased, 1876. 



48403. A right maxilla, with the cheek-teeth agreeing in size with 

 No. 47786. Same history. 



47755. Part of a rather larger right maxilla, containing two 



(Fig.) incisors, the canine, and the cheek-teeth. Figured by 



Owen, op. cit. pi. ii. fig. 14. Same history. 



48402. Part of a similar right maxilla, containing pm. 4 and five 

 true molars. Same history. 



47787. Part of a jaw with teeth, perhaps generically identical with 



the preceding. 



Genus LEPTOCLADUS, Owen 1 . 



The hinder lower true molars are simply conical, but the most 

 anterior one 2 has antero-posterior cusps ; the cheek-teeth are sepa- 

 rated from one another by long intervals ; and pin. 4 is not taller 

 than m . 1. 



1 Mesozoic Mammalia (Mon. Pal. Soc.), p. 53 (1871). The name was applied 

 merely as a provisional one ; but its right to distinction is confirmed by the 

 (MS.) observations of Osborn. 



2 Beckoned by Owen as a fifth preraolar. 



TJ2 



