E. LÖNNBERG, MAMMALOGY OF ECUADOR. 43 



M. pratti,^ but this appears also to be different as the author 

 quoted describes its colour as »olive green» by means of 

 påle yellow annuli. It is also said to be »bright yellow» 

 behind the ear and »down the front of the thigh to the 

 hock.» This must evidently be miich different from the 

 rufoiis of the specimens from Ecuador. 



Quite recently Thomas (1920) has described a new sub- 

 species, 31. pratti limani, from Rio Negro above Manaos. 

 This animal appears to be paler than the present form and 

 less rufous. The nape streaks are f. i. termed »bright ochra- 

 ceous buffy», which evidently is much different from the 

 »orange rufous» of the present specimens. The skull and 

 teeth of M. p. limanus are also larger, the upper molar series 

 being 12,3 mm. 1916 Allén ^ has expressed the opinion that 

 Pocock's M. pratti is referable to Wagler's Dasyprocta exilis, 

 and he renomed then his own M. milleri as i¥. exilis milleri. 

 The present race from Eastern Ecuador is thus probably 

 also to be considered as a subspecies of M. exilis. 



Coelogeiiys. 



When Ltnnaeus in Syst. Nat. ed. XII, 1766 (p. 81) de- 

 scribes his Mus Paca^ he quotes several authors. In the first 

 rank Rajus' »Mus brasiliensis, porcelli pili & voce», but in 

 the third: »Paca. Marcgr. brås.» For the sake of tautonymy 

 it may be assumed that Marcgrav's animal constitutes the 

 type for the present Coelogenys^ jjaca and the type locality 

 is thus perhaps Pernambuco. 



LiNNAEUS himself had indicated »Brasilia, Guiania». 



Since that time new names have been introduced in the 

 literature, and new forms of Pacas described. The specific 

 names julvus and subniger given by F. Cuvier 1807 appear 

 to refer to colour varieties only of the typical Paca and 

 have always been disregarded for that reason. 



In the year 1854 Gervais described^ a skull of a Paca 

 under the name of Coelogenys suhlaevis. It was characterized 



^ Ann. Mag. N. H. (8) XII, 1013, p. 110. 

 - Bull. Amer. Mus. XXXV, p. 205. 



' Coelogenys F. Cuv. being regarded as nomen conservanduin and to 

 be prefered before Agoiiti Lacép. 



■* Hist. Nat. des Mammiféres, Paris, 1854, p. 320. 



