342 riDELPHTIDa!. 



7. Didelphys cinerea. 



Didelphys cinerea, Temvi. Mm. Mamm. i. p. 46 (" 1827 " *) ; Wied, 



Beitr. Nat. Bras. ii. p. 406 (1826) ; JDetm. Diet. Sd. Nat. xlvii. 



p. 394 (1827); Gray, Griff. Cuv. An. K. v. p. 188 (1827) ; J. B. 



Fisch. Syn. Mamm. p. 267 (1829); Less. H. N. Mamm. (Compl. 



Buff.) V. p. 365 (1836) ; Waterh. Jard. Nat. Lihr., Mamm. xi. 



p. 103 (1841) ; Wagn. Schr. Saug. Supp. iii. p. 47 (1843), v. 



p. 239 (1855) ; Schinz, Syn. Mamm. i. p. 507 (1844) ; Waterh. 



N. E. Mamm. i. p. 501 (1846) ; Gieb. Sang. p. 712 (1859) ; Thos. 



P. Z. S. 1880, p. 403 ; Alst. Biol. Cent- Am., Mamm. p. 199, pi. xxi. 



(animal) 1881; Thos. P.Z.S. 1882, p. Ill; Natt. Pelz. Bras. 



Saug., Verh. e.-b. Wien, xxxiii. Anh. p. 114 (1883) ; Lyd. Cat. 



Foss. Mamm. B. M. v. p. 281 (1887). 

 Micoureua cinereus, Less. N. Tabl. B. A., Mamm. p. 186 (1842). 

 Philander cinereus. Gray, List Mamm. B. M. p. 101 (1843) ; Oer- 



rard, Cat. Bones Mamm. B. M. p. 139 (1862). 

 Didelphys noctivaga, Tschudi, Faun. Peruana, Mamm. p. 148, pi. viii. 



(animal) (1844) ; Wagn. Schr. Saug. Supp. v. p. 239 (1855) ; Gieb. 



Saug. p. 714 (1859). 

 Didelphys (Metachirus) cinerea, Burm. Thiere Bras. i. p. 137 (1854). 

 Grymseomys cinereus and scapulatus, Burm. Erldut. Faun. Bras. 



pp. 78 & 79, pi. xii. (animal) (1856). 

 Didelphys waterhousei, Tomes, P. Z. 8. 1860, pp. 58, 217 & 307 (fig. 



skull), pi. Ixxvi. (animal). 



AsHT Oposstjm. 



Size largest of the present group, although considerably smaller 

 than in any of the foregoing species. Fur soft, close and slightly 

 woolly. General colour clear grey, washed with yellowish on the 

 sides ; often slightly suflPused with rufous. Rhinarium as in D. phi- 

 lander, its lower edge with two notches on each side. Pace grey, 

 a more or less prominent black band passing through and round the 

 eye. Ears (PI. XXVI. fig. 7) large and rounded, laid forward (in 

 spirit-speeimens) they reach to the anterior canthus of the eye.; 

 naked, flesh-coloured, their anterior margins with a long pointed 

 basal projection ; metatragus narrow, rounded. Chin, chest, and 

 belly pale yellowish white, the bases of the hairs grey ; the line of 

 demarcation not sharply defined. Pouch absent; mammae 4-1-4=9, 

 or 5-1-5=11 1- Arms and legs grey; feet nearly naked, whitish 

 or pale brown. Pads (PL XXVI. fig. 8) large, rounded, finely 

 striated, the sole between them smooth ; six well-defined anterior, 

 and five or six posterior, the hallucal doubtfully divided into two, 

 their positions and sizes as in the figure. Tail furry at its base for 

 from half an inch to two inches, then (not very abruptly) becoming 

 naked and scaly, a few minute hairs only present between the 

 scales ; its colour slaty grey proximally, white or yellow terminally, 

 the two colours passing gradually into one another without pro- 

 minent mottlings. 



Shull (PI. XXVII. fig. 2) strongly built, the zygomata widely ex- 

 panded, the nasals markedly expanded behind. Interorbital region 



• See note, p. 195. 



t Two specimens only examined, each showing one of these numbers. 



