1. BIDELPHYS. 



349 



or 15, the anterior ones almost level with the elbows, the central 

 one opposite the most posterior pair but one. Outer sides of limbs 

 like back, inner sides like belly ; hands and feet white or pale brown, 

 nearly naked ; fifth hind toe shorter, though very slightly so, than 

 the second ; pads (PI. XXVIII. fig. 1) low, rounded, little prominent. 

 Tail long, slender, tapering, its base scarcely furry ; uniformly pale 

 grey, rather lighter below. 



iihull as in the preceding species, except that the supraorbital 

 edges are smoothly and evenly rounded, not developing any trace 

 of ridges, even in old specimens. 



Teeth as usual. Canines and premolars short vertically, broad 

 and strong longitudinally. P.' both above and below nearly filling 

 up the space between the canine and p.^ 



Dimensions. 



i (in spirit). e (In spirit). 



Adult. Adult. 



millim. millini. 



Head and body 83 92 



Tail 102 117 



Lower leg 21 24 



Hind foot 13 16 



Muzzle to eye 10-5 11 



Ear 13-5 14-5 



Skull, see p. 351. 



Hah. Brazil, from Santarem to Kio Grande do Sul. 

 Type not in existence. 



I Skin of head. I Santarem. Purchased. 



«• \ Skull. f 



1 Ad. sk. I Rio Janeiro. Earl of Derby [P.]. 

 "• \ Skull, f 



c. Ad. st. Santa Catherina. Purchased. 



J I Ad. sk. I , Santa Oatherina. Purchased. 

 ^- j Skull, f ^■ 



j Ad. al. I o Taquara, Rio Grande Dr. H. von Ihering [C.]. 



*• \ SkuU. ( ^ ■ do Sul. 



/, g. Ad. & imm. San Lorenzo, Rio Dr. H. von Ihering [C.]. 



al., S ■ Grrande do Sul. 



■h. Ad.al., § ,16/11/86. San Lorenzo. Dr. H. von Ihering [C.]. 



i. Ad. al., cj . (Described by Waterhouse.) 



11. Didelphys grisea, 



Micour^ a queue longue, Azara, Quadr. Parag. i. p. 290 (1801). 

 Didelphys grisea, Desm. Diet. Sci. Nat. xlvii. p. 393 (1827) ; J. B. 



Fisch. Syn. Mamm. p. 266 (1829) ; Less. H. N. Mamm. ( Compl. 



Bnff^ V. p. 364 (1836) ; id. N. Tahl. JR. A., Mamm. p. 186 (1842) ; 



Schinz, Syn. Mamm. i. p. 509 (1844) ; Waterh. N. H. Mamm. i. 



p. 504 (1846) ; Lyd. Cat. Foss. Mamm. B. M. v. p. 281 (1887). 

 Didelphys incana, Lund, Blik. Bras. Dyr., Dansk. Afh. viii. p. 237 



