4 PLATTCH(EKOPID^. 



Cope ^ in the Insectivora, as an annectant form between Erinaceus 

 and Tilloihzrium, but was subsequently ^ referred to the same family 

 Q.S DAtatherium^. The latter view is not accepted by Schlosser*, 

 who regards the genus as allied to the Tillodontia. In Esthoni/a^ihe 

 dentition (woodcut, fig. 2), is I. |, C. \, Pm. | M. |. The larger 

 pair of incisors are scalpriform, but do not grow from persistent 

 pulps ; the cheek-teeth are verj^ similar to those of Ancliippodus. 



It will be obvious that the systematic position of Platychcerops 

 entirely depends on its apparent relationship to Estlionyx'\ 



Genus PLATYCHCEROPS, Charlesworth^ 

 Syn. Miolophus, Owen'''. 



Platychoerops richardsoni, Charlesworth^. 

 Syn. Miolophus planiceps, Owen^. 

 JIab. Europe (England). 



M. 3566. Cast of the imperfect palate, showing rr\. 2 and m. 3 on 

 both sides, the right p™^, and the alveoli of pm. 3 and 

 m- ^ of the two sides. The original, which is the type of 

 the genus and species, is preserved in the Museum at 

 York, and is described and figured by Owen, op. cit. pi. x. 

 fig. 1, as Miohplius planiceps ; it was obtained from the 

 London Clay of Heme Bay, Kent. 



Made in the Museum. 



^ Vertebrata of the Tertiary Formations of the West (Eep. U.S. Geol. Surv. 

 Terr. vol. iii.), Book i. p. 197 (1884). 



2 Amer. Nat. vol. xviii. p. 480 (1884). 



3 Vide ivfra, Supplement. 



* Morphol. Jabrb. vol. xii. p. 288 (1886). 



^ Since the above was written, the author has received a letter from Mr. H. 

 F. Osborn, of Princeton, New Jersey, who during a recent visit to England 

 examined the cast of Platychoerops, in which he states his opinion, after an 

 examination of the American specimens of Esthonyx, that the latter is not 

 generically separable from the former. 



« Rep. Brit. Assoc, for 1854— Trans, of Sections, p. 80 (1855). 



^ Geol. Mag. dec. 1, vol. ii. p. 339 (1865). 



^ Loc. cit. ® Loc. cit. 



