680 CLASS XVII. 



Note. Allied to this genus are Otomys SMITH (not Cuv., Malacotkrix 

 WAGN.) and Mystromys WAGN. Comp. SCHKEBER'S Saugth., Supple- 

 meniband, 3te Abth. s. 496 501. 



Family XXVII. Cunicularia (Georhychi WiEGM.). Incisors 



4 4 



exsert, cuneate, with apex truncated, straight; molars mostly 43 > 



Q _ Q 



more seldom ~ -5 . Feet pentadactylous, cloven. Ears none, or 

 o o 



in a few very short. Eyes small, sometimes concealed by skin. 

 (Body thick, head obtuse, tail short or none.) 



Rhizomys GRAY, Nyctocleptes TEMM. Incisors broad, smooth in 



O _ Q 



front, with red enamel, molars ~ o small, complex. Head broad, 



o o 



short, truncated anteriorly. Ears very small, rounded. Eyes 

 small, placed towards the upper surface of head. Fore feet tetra- 

 dactylous, with hallucar wart unguiculate; claws short. Tail 

 short. 



Sp. RUzomys decan nob., Nyctocleptes decan TEMM., TEMMINCK in Bijdragen 

 tot de NatuurTc. Wetenschappen, vn. 1832, bl. I 8, PL i, Monogr. de 

 Mammal, u. pp. 40 45, PL 33, Mus Sumatrensis KAFFL., LINN. Trans. 

 Xin. 258? Rhizomys Sumatrensis and Rh. Sinensis GRAY, Proceed. Zool. 

 Soc. I. 1830 1831, p. 95; an animal of the size of a rabbit that feeds on 

 the roots of the bamboo-cane ; it has not been observed at Sumatra, but in 

 Malacca and China. WAGNER refers to this genus also Bathyergus splen- 

 dens KUEPPELL, a small species from Abyssinia, with ears more developed 

 and in some degree a different habitus; RUEPPELL Neue Wirbelthiere, 

 Tab. 12, KRAUSS 1. 1. Tab. 20, fig. 2. The skull and the teeth appear to 

 support this opinion. 



Ctenomys BLAINV. Incisor teeth smooth, orange-coloured, 



44 

 molars - j, destitute of roots, simple, decreasing in size from 



the first to the last, which is small, with crown of the upper 

 obliquely lunate, concave outwards, of the lower oval. Ears small. 

 Tail somewhat short, clothed with appressed hair. Rigid, in- 



curved hairs at the base of claws. (Dent. form. OWEN, i -< > 



Sp. Ctenomys Irasiliensis BLAINV., KRAUSS 1. 1. Tab. 20, fig. 5 (from the 

 figure in D'ORBiGNY's Voyage) ; Ctenomys magellanicus BENNETT, Trans. 

 of the Zool. Soc. n. Tab. 17, WATERHOUSE Mamm. n. PL 9, fig. 2. 



