64 0)1 Main ruah from the Servo do Mar of Purand. 



Dimensions of the type (immature*, measured in tlie 

 flesh) : — 



Head and body 300 millim. ; tail 230 ; hind foot, 9, u. 58, 

 c. u. 6o ; ear 24. 



Skull: basilar length 55; greatest breadth 41; nasals 

 19x14; interorbital breadth 21*5; breadth between ridges 

 on fronto-parietal suture 31 ; palate length 27 ; diastema 16 ; 

 length of tooth-series 16. 



Type. Male. Original number 797. Collected 22nd 

 August, 1901. 



Compared with the specimen figured by Mr, Sclater f as 

 C. spxnosus this animal differs by its much longer coat, both 

 of hairs and spines, the greater length of the orange tips to the 

 spines, the broad tipping with white of the spines of the sides 

 of the base of the tail, its larger teeth, and more ridged supra- 

 orbital edges. In Waterhouse's description \ of the type of 

 C. spinosus the account of the coloration of the caudal spines 

 agrees exactly with the condition in Mr. Sclater's specimen, 

 so that of the two examples the latter is clearly the one to be 

 taken as representing C. spinosus. 



The date of Mr. Robert's specimen — August — is conclusive 

 proof that the absence of the long coat of hairs found in the 

 common species is not due to a summer change, as has been 

 suggested. 



Neither Natterer, Hensel, nor Ihering seem to have ob- 

 tained a porcupitie of this type in Southern Brazil, and 

 Jl r. Kobert is to be congratulated on so interesting a discovery. 



Two. 

 Five. 



14. Dasyprocta Azarce, Licht. 



15. Cavia ruftscens, Lund. 



16. Mazauni nemorivaga, F. Cuv. 



Skull. J- 



17. Didelphis viarsupialis, Linn. 



One. 



Two. 



18. Metachirus oponsum, Linn. 



♦ Last upper molar just cutting the gum ; tlie lower one, however, is 

 upon a level with the others, 

 t P. Z. S. \^M, p. 389. 

 X N. H. Mamm. ii. p. 421 (1848). 



