RODENTIA—GEOMYINAE—GEOMYS MEXICANUS. 387 
Measurements. 
Inches. Lines. 
Nose to root of tail (very uncertain).-......--.------------ 10 6 
Tail from root'to end of vertebrat ...--- 22-22 22 cs-4----- BN arto ae 
Arm, forefoot to end of claws........---.---... ee aaa 1 9 
lonpesiaws (Sd)bse-cstecnoen 8. et oe sal nae jokey 8} 
MAIDA Woe teenies eee aan ocean bans cle d wie 5} 
Ton Lele Oi Se mecca. oo Cee eee ess 2 Seen 1 4 
Bacoudne luieem snes eee ase ee ea ee eon. als osem ams nig 6 
BS SINE Br ANOVG ese soe sa ees oe eo ce | ane onee ees 
GEOMYS MEXICANUS. 
Tucan. 
Ascomys mexicanus, (Licutr.) Brants, Muizen, 1827, 27. 
Licur. Abh. K. Akad. Wiss. 1827, 113. 
Wacner, Suppl. Schreb. II, 1843, 384.—In. in Schreber IV; pl. ccvi, A (interpolated). 
CuarLeswortH, Pr. Zool. Soc. Lond. IX, 1841, 60. 
Saccophorus mexicanus, Fiscumr, Syn. 1829, 305. 
Eypoux and Gervais, Guerin Mag. de Zool. VI, 1836, 23; pl. xxi, f. 5,6. 
Eypoux and Gervais, Voyage de la Favorite, V, 1839, 23; pl. viii, f. 5,6. (Skull.) 
Geomys mexicanus, Luconts, Pr. A. N. Sc. Ph. VI, Sept., 1852, 160. 
Pseudostoma (Geomys) mexicanus, Aup. and Baca. N. Am. Quad. III, 1854, 309. 
Tucan, HERNANDEZ. 
Se. Cu.—‘‘ Fur very fine, shining, very dark cinereous, above tipped with black, beneath entirely cinereous; nose and 
whiskers brownish ; breast and fore legs slightly tinted with brown. Ears short. Upper incisors with a very deep groove 
on the middle of the anterior surface. Feet thinly clothed with brownish hair. Tail covered with hair, which is very dense 
and long at the base, gradually becoming shorter and more scanty, leaving the tip almost naked.”’ 
The preceding diagnosis is by Dr. Leconte, from a specimen in the collection of the Philadel- 
phia Academy.1 The length is given at 11 inches; tail 5; fore foot to end of middle claw 1.7 
inch ; hind foot to end of middle claw 1.7 inch. 
- This completes the record of American animals of the genus Geomys, with the exception, per- 
haps of the Saccophorus quachil, of J. E. Gray, Pr. Zool. Soc. XI, 1841, 79, from Coban, 
Central America. As no description accompanies the name, we can only learn that the genus 
extends this far to the south. 
1 As this article is passing through the press, I find (too late for use) a specimen of this species in the collection of the 
National Institute, brought from Mexico by Baron Gerolt. It is much larger than any skin of the genus I have ever seen. 
