Mummuh froin the Lower Ainnzon. 87 



Ilemiderma perspi'cillatum, L. 



c^. 8 ; ? . 9. Boim, R. Tapajoz {H:. Saelhlage). 

 cJ . 1, 3 ; ? . 2. Apehu, near Fara. 



Glossophaga soriciiiay Pall. 



c? . 37 ; $ . 10, 11, 12, 14, 35, 36, 37, 38, 39. Faro. 

 " In an old house." 



Artiheus cinereus, Gerv. 



c?. 2, 3 ; ? . 1. Boaevides, E.F.B., near Para. 

 ? . 33. Faro. 



Sciurus a'stuans gilvigularis, Wagn. 



? . 25. Faro {0. Martins). 



M early topotypical, S. gilviguliris having been described 

 from Borba. Four pairs of mamni«. 



Nectomys squamipes, Bts. 

 S . 14. Benevidcs, near Para. 



CEcomys tapajinus, Thos. 



c?. 2; ? . 1. Marajo. 



Somewhat intermediate between (E. tapajinus and CE. 

 ffuiatiiv. 



Dactylomys dactylinus canescens, subsp. n. 



Essential characters as in true dactylinus, but colour greyer 

 and less buffy. Flanks especially clear greyish, without 

 any of the buffy so strongly marked in the type form. 

 Kusty colour of underfur strongly marked along the middle 

 dorsal area. Back of hind legs rich ochraceous. Under 

 surface white. 



Dimensions of the type (measured in skin) : — 



Head and body (c.) 300 mm.; tail 420; hind foot 58. 



Skull : condylo-basal length 73 ; condylo-incisive length 

 70 ; zygomatic breadth 38'5 ; upper tooth-series 21*5. 



J lab. Itacoatiara, below ilanaos. Middle Amazons. 



Type. Adult. B.M. no. 11. 12. 22. 15. Collected October, 

 1911, by Mr. W. M. Mann. 



It has not been by any means easy to settle what should 

 be taken as the type form of Dactylomys, for the original 



