South-African Rodents. 5 



Skull : greatest length 40; breadth 21'5 ; nasals, length 16, 

 greatest breadth 4. 



This specimen, with others, was collected by Mr. F. C. 

 Selous, and was referred to G. leucogaster with doubt by the 

 writer (P. Z. S. 189G, p. 807) ; but further comparison with 

 younger specimens of G. afer and G. leucogaster allow of no 

 doubt as to their distinctness, my conclusions being based on 

 six skins and seven skulls of this species and a large number 

 of its nearest allies. 



Gerbillus {Pachyuromys) auricular is } Smith. 



Gerbillus auricularis, Smith, S. Afr. Quart. Journ. ii. 1834, p. 160. 

 Gerbillus brevicaudatus, F. Cuv. Trans. Zool. Soc. ii. 1836, p. 144, 

 pi. xxvi. tigs. 10-13. 



This curious Gerbil, with its short thick tail, is very diffe- 

 rent from any South-African member of the genus ; it inhabits 

 dry sandy districts, especially parts of Namaqualand ; but 

 several specimens have lately been received from Mr. A. Wolf 

 Curry, taken in the neighbourhood of Kimberley — the only 

 other member of the subgenus (G. Duprasi) being found in 

 the Algerian Sahara. 



Otomis, F. Cuv. 



Otomys, F. Cuv. Dents des Mamm. p. 108, pi. lx. (1825) (nee A. 



Smith). 

 Euryotis, Brants, Muizen, p. 93 (1S27). 



Otomys irro7'atus } Brants. 



Mus irroratus, Licht. MS., nom. nud. 

 Euryotis irrorata, Brants, Muizen, p. 94, pi. (1827). 

 Otomys bisulcatus, Cuv. & Geoff. Mamm. livr. lx. fig. 265 (1829). 

 Euryotis typicus, Smith, S. Afr. Quart. Journ. ii. p. 149 (1834). 

 Euryotis irroratus, Smith, 111. Zool, S. Afr. pis. xxii., xxv. fig. 1 (1840). 

 Euryotis obscura, Licht. Verzeichn. Saug. u. Vogeln Kafferlands, Berlin, 

 p. 10 (1842). 



This species is widely distributed, frequenting wet or 

 marshy places. Both upper and lower incisors are deeply 

 grooved and the third upper molar has six enamel folds. 



Otomys unisulcatus, F. Cuv. 



Otomys unisulcatus, Cuv. & Geoff. Mamm. livr. lx. fig. 264 (1829). 

 Euryotis unisulcatus, Smith, S. Afr. Quart. Journ. ii. 1834, p. 149 ; 111. 



Zool. S. Afr., Mamm. pi. xxiii. (1840). 

 Euryotis pallida, Wagner, Wiegm. Arch. 1841, p. 134. 

 Otomys rujifrons, Riippell, Verzeichn. Mus. Senck. i. 1842, p. 28, nom. 



nud. ; Wagner, Schreb. Saug., Supp. iii. p. 507 (1843). 



