140 MACR0PID32. CHIRONECTES. 



The Marmose. Philander murinus. 



Cervical vertebrae 7 



Dorsal 13 



Lumbar 6 



Sacral 2 



Caudal 37 



*a. Skull. S. America. 



6. Skeleton : male. Brazil. From M. Verreaux's Collection. 



Merrian's Opossum. Philander dorsigerus. 



*a. Skull. Para. Presented by R. Graham, Esq. 

 *b. Skull. 



MICRODELPHYS. 

 Microdelphys tristriata. 

 Burm., Faun. Bras. taf. 11. fig. 7 (skull). 



THYLAMYS. 



Teeth :— Incisors ^ ; Canines £* ; Premolars |=| ; Molars ^ ;=50. 



The Elegant Painted Mouse. Thylamys elegans. 

 Waterhouse, Nat. Hist. Mamm. i. pi. 22. tig-. 3 (skull). 



a*-*d. Skulls. Chili. From Mr. Bridges' Collection. 

 e, f. Skeletons. Chili. From Mr. Bridges' Collection. 



Thylamys agilis. 



Grymreomys agilis, Burm., Faun. Bras. taf. 11. fig. 6 (skull). 



CHIRONECTES. 



Teeth: — Incisors^; Canines^; Premolars || ; Molars^; =50. 



The Yapock. Chironectes variegatus. 



Didelphys palmata, Burm., Faun. Bras. p. 74. taf. 11. fig. 3 (skull). — 

 Gervais in Castelnau, Am6rique du Sud, p. 101. pi. 20. fig. 3 (den- 

 tition), 1855. 



*a. Skull. Brazils. 



*b. Skull. Brazils. From Mr. Brandt's Collection. 



