20 Mamm. 
MAMMALIA. 
Oamelidac. 
Camelus dromedarius. W. Turner has notes on the lobules and con- 
nective tissue of the liver ; J. Anat. Phys. xi. pp. 354-356. 
Procamelus occidentalin. E. D. Cope describes a cast of the brhin 
cavity ; P. Arc. Phil. Soc. xvii. pp. 49-52, pi. i. 
^ GLIRES. 
J. A. Allen gives a list of described extinct North American Rodents, 
with references ; N. Am. Rod. pp. 943-949 [suprd^ p. 3]. 
J. A. Ryder remarks on the difference in form of section of the 
incisors in this order and in other rodent-like Mammals, concluding 
that when they are wider than thick the gnawing habit is more feebly 
developed ; J. Ac. Philad. 1877, pp. 314-318. 
^ SciURiDiE. 
J. A. Allen monographs the American species, including the Neotropical 
and extinct forms ; N. Am. Rod. pp. 637-939. 
^ Sciurus carolinensis. The central American form is described as var. 
yucatanensis ; J. A. Allen, tom. cit. p. 705. 
Sciurus vulgaris. On its existence in Ireland : J. Douglas-Ogilby, 
Zool. 1877, p. 223 ; J. E. Harting, tom. cit. p. 224 pfe". A. Mahoney, tom. 
cit. p. 290. 
Sciurus rigidus. On its habits in confinement ; J. von Fischer, Zool. 
Gart. 1877, pp. 21-27. 
Ji SpermopTiilus xanthoprymnus (Benn.) redescribed ; 0. G. Danford 
and E. R. Alston, P. Z. S. 1877, pp. 277 & 278. 
Spermophilus citellus. Notes on its habits; L. Martin, Zool. Gart. 
1877, pp. 42-45. 
Haplodontid.®. 
^ E. OouES monographs this family, fully describing (for the first time) 
its anatomy, and confirming its position among the Sciuromorpha. 
N. Am. Rod. pp. 549-599, pi. vi. 
A Haplodon rufus. On its habits : E. Ooues, 1. c. ; F. S. Matteson, Am. 
Nat. xi. pp. 434 & 435. 
Oastorid®. 
J. A. Allen monographs the Nearctic recent and fossil forms ; he 
considers the living American Beaver to be a variety of the Palaearctic 
Castor fiber. N. Am. Rod. pp. 431-454. 
J Castor fiber is perhaps not wholly extinct in Jemtland ; P. Olsson, 
CEfv. Ak. Forh. 1876, No. 3, p. 113. 
Castoeoidid®. 
J. A. Allen separates Castoroides as a distinct family under this name 
removes it from the vicinity of Castoridce, and places it among the 
Hystrichomorpha. N. Am. Rod. pp. x.*, 419-426. 
