the Asiatic Bamboo-Rats. 57 



of Nyctocleptes^ and the third of a new genus now described. 

 The chief characters of these three genera are as follows : — 



1. Nyctocleptes, Tenim. 



Size very large. Palm and sole-pads low, hardly raised 

 above the general surface, granulated, the two posterior sole- 

 pads conjoined. Mammne 2 — 3 — 10. 



Anteorbital foramina oval or circular. Posterior naves 

 well open, often nearly as wide as high. 



Set of incisors intermediate between that found in the other 

 two genera. M 1 about the size of m 2 , not or rarely worn to 

 a lower level. 



Range. Burma, Malay Peninsula, and Sumatra. 



Type. Nyctocleptes sumatrensis {Nyctocleptes dekan, 

 Temm.). Other species ciuerens, McCl. (including erythro- 

 genys, Anders.), and insularis, sp. n. (infra). 



2. Rhizomys, Gray. 



Size rather less than in Nyctocleptes. Palm and sole-pads 

 distinct, granulated, the two posterior sole-pads separated, 

 though enlarged. Mammae normally 1 — 3 = 8, though 

 occasionally a minute anterior pectoral pair, not functional 

 in any specimen examined, may be present. 



Anteorbital foramina subtriangular. Posterior naves con- 

 tracted, much higher than broad. 



Incisors forming a segment of a comparatively small circle, 

 their points directed backwards. M 1 decidedly smaller at all 

 ages than m 2 , and worn in adults much below the level of 

 the latter. 



Range. Assam, Burma, and Siam to South China. 



Type. R. sinensis, Gray. Other species, vestitus, M.-Edw., 

 davidi, Thos., pruinosus, Blyth, latouchei and pannosus, 

 spp. nn. (infra). 



3. Cannomys *, gen. nov. 



Size comparatively small. Palm and sole-pads normal, 

 well defineu, not granulated. Mammas 2 — 2 = S. 



Anteorbital foramina and posterior naves much as in 

 Rhizomys. 



*• From Kawa, cane or bamboo. While searching for a suitable name 

 for this animal, 1 have noticed that the term Myoryctes, given to a fossil 

 Madagascan rodent by Dr. Forsyth Major (Geol. Mag. (5) v. p. 97, 1908), 

 is preoccupied by Eberth (Zeitschr. Wiss. Zool. xii. p. 580, 180o) 

 (Myoryktes, quoted as Myoryctes by Scudder, ' Noinenclator,' p. 204, 

 1882). 1 would suggest renaming the Malagasy genus Majoria, after its 

 distinguished discoverer and describer. 



