358 DIDBtPHTIDai. 



trace of postorbital processes. Palate with a pair of very narrow 

 vacuities opposite tte two anterior molars. 



Teeth large and strong. Upper canines stort and thick. Pre- 

 molars large, evenly increasing in size backwards, p.' nearly or 

 quite filling up the space between the canine and p.^ Molars 

 large, triangular, the combined lengths of the three anterior ranging 

 from 5-8 to 6-8 miUim. Lower p." and p.* about equal in size. 

 Lower molar series about 8 to 8*8 mUlim. 



6. ?. 



* (in spirit), b (in spirit). 



Adult. Adult. 



milUm. millim. 



Head and body 150 130 



TaU 87 70 



Lower leg — 28 



Hind foot 23 19 



Ear 12 11-5 



Muzzle to eye — 16 



Skull, see p. 367. 



Hah. Guiana and Brazil. 

 Type not in existence. 



I Ad. sk. I , Bahia. Purchased. 



■ I Ad. al., I n Lidth de Jeude Coll. 



*'"■ •jSkuUoh.f?' 



Ad. al. I , Lidth de Jeude Coll. 



^- ■* SkiJl. ' f ^ 



e. 



Ad. St. i H. W. Bates, Esq. [C.]. 



Skull. 



„ j Ad. al. i o Eoyal College of Surgeons [E.]. 



■'■ 1 Skull. ( +• {Typeoin.hunteri,Ws.teTh.) 



16. Didelphys domestica. 



Didekihys domestica, Wagn. Arch. f. Nat. viii. p. 359 (1842) ; 



Schinz, Syn. Marrvm. i. p. 506 (1844) ; Wagn. Ahh. Ak. Munch, v. 



p. 153 (1847) ; id. Schr. Sdug. Supp. v. p. 255 (1855) ; Gid). Sdug. 



p. 717 (1859) ; Natt. Peh. Bras. Sdug., Verh. z.-h. Wien, xxxiii. 



Anh. p. 117 (1883). 

 Hemiurus huateri, Oerv. Casteln. Am. Sud, Mamm. p. 101, pis. xvi. 



fig. 2 (animal), and xx. fig. 1 (skull) (1865) {neo Waterhouse) \. 

 Hemiurus concolor, Oerv. op. cit. lettering to pi. xvi. (1855) . 



Size large. Fur thick, straight and soft. General colour pale 

 grey. Face uniformly grey, no darker mark round the eye. Ears 

 large and rounded, laid forward (in spirit-specimens) they reach 

 just to the anterior canthus of the eye. Crown and whole of back 



* In the Stuttgart Museum. 



t This determination is Ibased on the authority of specimen a, received 

 from the same coUeotion as Prof. Gervais's individual. 



