Bats and Rodents from America. 5AT 
the premaxillary processes behind. Interorbital region 
broad, almost parallel-sided, the ridges strong, but becoming 
almost obsolete as they pass the fronto-parietal suture, then 
thickening again as they pass along the parietals. Inter- 
parietal large. Anterior palatine foramina of about the usual 
length, but, owing to the great size of the molars, their 
hinder end is only just in front of the level of m.* Incisors 
broad and strong. Molars excessively large and heavy, more 
so than in any other species. 
Dimensions of the type (an adult male, measured in flesh 
by collector) :— 
Head and body 205 millim.; tail 238; hind foot* 54; 
ear 23. 
Skull: greatest length 47-5, basilar length 38-5; greatest 
breadth 26; nasals 18°5x6; interorbital breadth 9; inter- 
parietal 5°5xX11°8; palate length from henselion 22:2; 
diastema 12°5 ; palatine foramina 8°2 x 3:4; length of upper 
molar series 8°7. 
Hab. Ibarra, N. Ecuador, alt. 2225 metres. Coll. W. F. H. 
Rosenberg, 19th May, 1897. 
This fine species may be readily distinguished from all 
others by its broad heavy skull, large molars, and sombre 
coloration. 
Nectomys russulus, sp. n. 
Size considerably smaller than in the known species of 
Nectomys, the general appearance being more that of a large 
clumsily-built Oryzomys. Fur straight, thick, and glossy ; 
hairs of back about 13 cr 14 millim. in length, the underfur 
less woolly and less markedly different from the longer fur 
than in the other species. General colour dark russet-brown, 
very uniform in tone, without special markings anywhere, the 
light-coloured rings of the hairs dark fulvous. On the sides, 
as usual, the fulvous becomes rather clearer and the general 
tone lighter. Belly not sharply defined, little paler than the 
sides, its hairs slaty basally, dull buffy or clay-colour ter- 
minally. ars rather small, thinly haired, practically naked. 
Upper surface of hands and feet brownish. ‘Tail long, ex- 
cessively finely scaled, very thinly clothed, dull brownish 
above and below. 
Skull heavily built, very like that of an ordinary Nectomys 
in miniature. Nasals evenly narrowing backwards, not con- 
tracted at their centres. Interorbital region broad and flat, 
its edges very strongly ridged, the ridges well developed 
* Attention may be again drawn to the fact that all hind-foot measure- 
ments taken by myself or by British collectors are without the claws, as 
opposed to the American method of including them. 
