MIS OLDFIELD THOMAS 



are closer together mesially and show scarcely a trace of the 

 usual pectination. 



The skull of D. youngi is rather more rounded, ami less 

 constricted in the interorbital region than that of Ih rotundus. 

 The anterior palatine foramina are smaller, the posterior nares 

 broader and more widely open, the bullae larger, and the co- 

 ronoid process of the mandibles less lengthened anteroposterior^". 



Dr. Jentink's type came from Berbice, British Guiana, and 

 the present represents only the second occurrence of the species. 



11. Diphylla ecaudata, Spix. 



2 specimens. 



The excessive rarity of this hat makes these examples of the 

 utmost value. No specimens referable to Diphylla have hitherto 

 been received by the British Museum , nor so far as I can 

 ascertain are other Museums much richer in this respect. 



Posterior incisors are present on each side of the upper jaw, 

 in the normal position. They are said to be absent in the Berlin 

 example described by Dobson. 



15. Cavia porcellus, L. 

 One specimen. 



10. Dasyprocta azarae, Licht. 

 One young specimen. 



17. Loncheres dasythrix, Hens. 



Two immature specimens, apparently referable to 



this species. 



18. Tatù (') septemcincta, L. 

 One specimen. 



Mr. Rhoads ( 2 ) rejects the name of septemcincta on the ground 

 that Linmeus's animal had its habitat « in Indiis », but that 

 expression was of course constantly used for any animal that 

 came from abroad, and is no more to be treated seriously than 

 in case of Cabassous unicinctus (« habitat in Africa ») or Tolypeules 



(') Sec Palmer, P. Biol. Soc. Wash. XI, p. itl'., 1897. 



P) 1'. Ac. Philad. ibim, p. ll-i. 



