Larger Species of Geomys. 271 
taken strictly from the bottom of the groove. Molar teeth 
large. 
Dimensions of the type (an adult skin, B.M. 65.5.18.65) :— 
Head and body 320 millim., tail 135, hind foot without 
claws 50 *, length of longest fore claw 23. 
Skull (see table below). 
Hab. Dueiias, Guatemala. Coll. O. Salvin, Esq. 
Of the four Dueiias specimens of G. grandis two, collected 
in 1865, are undated, but the other two are marked August 
and December 1873, and these two show that the species 
becomes much less thickly clothed in the summer, the August 
specimen having its belly very nearly naked, with only a 
sparse covering ‘of hairs not hiding the skin. The type is 
intermediate in the amount of its covering between the two 
dated specimens. 
In their tone of coloration all the specimens seen are precisely 
alike. 
Besides the Duefas examples there is, as already noted, a 
young specimen of G. grandis in the Museum from Coban, 
and the Museum also contains another from Tehuantepec, 
which, with some doubt, I refer provisionally to the same 
species. 
Dr. Merriam’s G. gymnurust is perhaps allied to G. grandts, 
but the auisrences 4 in the colour will readily distinguish the 
two. 
Of the large soft-haired species of Geomys the Museum 
possesses unfortunately but a very small series; among 
them, however, is one which differs from the rest so much both 
in size and the characters of the incisors that, even apart from 
cranial characteristics, it is difficult to understand how it 
could have been referred to G. mexicanus. I would propose 
to call it 
Geomys Merriam?, sp. n. 
Size large. Fur soft but short. Colour reddish fawn, 
quite unlike the chestnut tone of @. mexicanus ; the hairs pale, 
slate-coloured basally, then with a subterminal band of fawn, 
their extreme tips brownish. A patch round and behind 
each ear dark brown. Belly and feet similar to back, but 
paler. Tail thinly haired, neither so absolutely naked as in 
G. hispidus and grandis nor so well clothed as in G. meet- 
canus; the latter species is, however, very variable in this 
respect. 
Skull stout and heavy, with the zygomata very widely 
* With claws 57. 
+ Proe. Biol. Soc. Wash. vii. p. 166 (1892). 
Zs 
