KODENTIA. 
297 
Measurements. 
M. 
Transverse diameter of an intermediate molar. 0.0055 
Antero-posterior diameter of the same... 0. 0025 
Transverse diameter of the first molar ... 0.0035 
Antero-posterior diameter of the first molar... 0. 0020 
Transverse diameter of the last molar.... 0. 0025 
Antero-posterior diameter of the last molar. . 0.0022 
This Rabbit was about the size of the Northern Hare. 
STENEOFIBER, Et. Geoffr. 
Pomel, Cat. Meth. Vert. Foss. Bassin de la Loire, etc., 1853, p. 20. 
Molars \ , prismatic ; the shaft with one deep inflection of enamel on 
each side, and the crown furnished with a few fossettes anterior and poste¬ 
rior to the inflections. In the superior series, the internal inflection is the 
most extended in the length of the shaft; the external inflection is the most 
prolonged in the inferior molars. Incisors not compressed nor grooved. 
Frontal region contracted, as in Fiber. 
Three species of this genus are enumerated by Pomel as having been 
found in the Miocene formations of France and of the Rhine, of which the 
longest known is the S. viciacensis. He points out that Steneqfiber differs 
from Chalicomys, Kaup, in the structure of the molar teeth. In the latter, 
there are two external and one internal enamel inflections in the superior 
molars, and one external and three internal inflections in the inferior molars. 
Two species of Steneqfiber have been described from North America, 
viz, the S. nebrascensis, Leidy, from Miocene beds of Nebraska, and the 
S. pansus, Cope, from the Santa Fd marls. These species agree with the 
European ones in dental, and, in the case of the former, in cranial charac¬ 
ters, differing in subordinate details, which I can only view as specific. 
Each of them has, like its European congeners, but a single inflection of 
the enamel on each side. 
Steneofiber pansus, Cope. 
Plate Ixix, figs. 4-14. 
Proc. Phila. Acad., 1874, p. 222; Ann. Eept. Chief of Engineers, 1875, ii, p. 993. 
Of this Rodent, I found the right mandibular and maxillary bones with 
all their molars, an incisor and a first superior molar of the left side, and 
