242 EXPLOBATION OF THE CANONS OF THE COLOBADO. 
only three pairs of teats two pairs inguinal, and one pair, longo intervallo, pec 
toral. These are very conspicuous, on naked scabrous spaces, and the thin 
coarse fur would hardly, I think, -hide others if they were present. In some 
species of this family I have distinctly recognized six pairs. I observe no 
sexual peculiarities in size' or color. 
The geographical distribution of the species has been already indicated 
as far as my present materials go. I am in .possession of no information 
respecting its habits, which, however, may be presumed to be the same as 
those of its congeners ; though the weaker feet and proportionally smaller 
pouches may indicate that the fossorial character is not pushed to such an 
extreme as is the case with G. bursarius. 
The written history of the species is brief and precise; the name having 
been only introduced in 1852. Audubon and Bach man's account is from Le 
Conte, and Baird redescribes LeConte's type. It is quite possible, and, 
indeed, probable, that this second Mexican species has figured at times under 
the name of mexicanus, but it would only tend to obscure a matter now clear 
to drag any such point to light. Now that we know of two perfectly good 
species in Mexico, the less said about the Tucan of Hernandez, or any simi 
lar subsequent uncertainties, the better. 
A Saccophorus quachil, from Guatemala, was named by Dr. Gray in 1843, 
though I cannot find that the species was ever described. But through the 
kind offices of Mr. R. B. Sharpe, who, with the assistance of Mr. Gerrard, 
examined the type still in the British Museum, at my request, I am informed 
that it is the animal first described, though subsequently named, by Dr. 
LeConte. 
The foregoing pages include all the species of Geomys with which I am 
acquainted, and account probably for all the names which have been intro 
duced excepting one, G. heterodus, recently described, from Central America, 
by Professor Peters, of which I know nothing. ("Uber neue Arten der 
Saugthier-Gattungen Geomys, Haplodon und Dasypus." < Monatsberichte 
Acad. Wissensch. Berlin, 1864, Mar. 17, pp. 177-180.) 
