1896.] GENERA OF RODENTS. 1015 
Suborder I. SIMPLICIDENTATI. 
A. ANOMALURI. 
I. Anomaluride. 
1. Anomalurus, Waterh. 
P.Z.S. 1842, p. 124. 
2. Idiurus, Matsch. 
SB. Ges. nat. Berl. 1894, p. 194. 
B. SCIUROMORPHA. 
II. Sciuridz. 
A. Scrurin. 
(a) 3. Rheithrosciurus, Gray. 
Ann. Mag. N. H. (3) xx. p. 271 (1867). 
4. Xerus, H. & H. 
Symb. Phys. i. gg (1832). 
5. Sciurus, Linn. 
S. N. (10) i. p. 63 (1758). 
. Tamas, Il. 
6 
Prodr. Syst. Mamm. p. 83 (1811). 
7. Spermophilus, F. Cuv. 
Mém. du Mus. ix. p. 293 (1822). 
8. Cynomys, Raf. 
Am. Month. Mag. ii. 45 (1817). 
9. Arctomys, Schr. 
Sang. iv. p. 721 (1792). 
(6) 10. EHupetaurus, Thos. 
J.A.S. B. lvii. p. 256 (1888). 
11. Petaurista, Link. 
Beytr. Nat. ii. p. 78, (1795). Type 
“Sciurus petaurista.”  [Pteromys, G. 
Cuv. Lécons d’Anat. Comp. 1800. ] 
12. Sciuropterus, F. Cuv. 
Ann. du Mus. x. p. 126 (1825). 
B. Nannoscruninaz}, 
13. Nannosciurus, Trouess. 
Bull. Soc. Sci. Angers, 1880, p. 73. 
III. Castoride. 
14. Castor, Linn. 
Syst. Nat. (10) i. p. 58 (1758). 
C. APLOLONTIA. 
IY. Aplodontiidz. 
15. Aplodontia*, Rich. 
Zool. Journ. iv. p. 334 (1829). 
1 See Major, P. Z. 8. 1893, p. 189. 
2 With regard to the insertion of the aspirate into the spelling of this and 
