9R() MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
1873.—Gill, T. The number of classes of vertebrates and their natural relations. < Amer, Journ, 
Sci. and Arts, vi, Dee. 1873. 
Gray, J.B. Hand-list of the edentate, thick-skinned and ruminant mammals in the British 
Museum. Forty-two plates of skulls, &e. 8°. vii, 176 pp., 42 pll. (1-41-+ 23a). London, printed 
by order of the trustees of the British Museum, 1873. 
Wilder, B. G. Present aspect of the question of intermembral homologies. < Proc. Am. 
Assoc. Ady. Sci, xxii, 1873, p. 303. : : 
1874.—" A.J. C.” Albinos [of various mammals and birds.] < Amer. Sports. Feb. 21, 1874. 
Chatin, J. Recherches pour servir & Vhistoire anatomique des glandes odorantes des mammi- 
feres. < Ann. Sci. Nat. 5e sér, xix, pp. 1-185, pl. i-ix. : 
Cope, E.D. On the homologies and origin of the types of molar teeth of mammalia educa- 
bilia. 49. 21 pp.,11., with 29 woodcuts in text. Philadelphia, printed for the author, March, 
1874. 
Milne-Edwards, A. Annales des sciences naturelles | Cinquitme série | Zoologie et paléon- 
tologie, comprenans lanatomie, la physiologie, la classification et Vhistorie naturelle des 
animaux publiée sous la direction de M. Milne-Edwards | Tome xix. | Paris | librairie de G. 
Masson... . 1874. 
Giglioli, BE. H. Recherches sur la distribution géographique générale, ou corologie, des animaux 
vertébrés: 3° région, boréo-américaine, et 4° région, é6thiopique (Bullettino della Societa Geogra- 
fica Italiana, t, xi, pp. 321-356, av. 1 carte in-plano. Rome, 1874). < Journ. de Zool. iii, 1874, 
art. lx, p. 354. 
Gill, T. The number of classes of vertebrates and their mutual relations. < Ann, and Mag. 
Nat. Hist. (4), xiii, Jan., 1874, pp. 71-73. 
Marey, E.J. Animal mechanism. A treatise on terrestrial and aérial mechanism. New York, 
D. Appleion & Co., 1874. 
[Eleventh volume of Appelton’s International Scientific Series.] 
Marsh, O.C. Small size of the brain in tertiary mammals. < Conn. Acad. Arts and Sci. June, 
1874; Ann. and Mag. Nat. Hist. (4), xiv, Aug. 1874, 167 pp.; Journ. de Zool. iii, 1874, pp. 
326-327. - 
Sclater, P.L. The geographical distribution of mammals. < Science Lectures for the People, 
no. 5, 6th series, 1874, pp. 67-84. 12°, 
Teutleben, E.v. Ueber Kanmuskeln und Kaumechanismus bei den Wirbelthieren. < Archiv 
Naturg. 40. Jabrg. 1874, pp. 78-111, pl. 2. 
Wilder, 8.G. The pectoral muscles of mammalia. < Proc, Am. Assoc. Adv. Sci. xxii, 1874, pp. 
305-307. 
Wilder, B. G. The outer cerebral fissures of mammalia (especially the ecarnivora) and the 
limits of their homology. < Proc. Am. Assoc. Ady. Sci. xxii, 1874, pp. 214-234. 
Wolf, J., and Elliot, D.G. The life and habits of wild animals. -Illustrated by designs by 
Joseph Wolf. Engraved by J. W. and Edwaid Whymper. With descriptive letterpress by 
Daniel Giraud Elliot, F. L.8., F. Z. S. 4°. 5 p.1., 72 pp., 1 1., 20 pll. London, Alexander 
Macmillan & Co., 1874; New York, Harper & Brothers, 1874. 
(With plates of (7) the female wapiti and puma (‘‘Stratezy versus Strength”); (9) the jaguar (‘‘ The Siesta”’) ; 
(12) the male wapiti and wolves (‘‘A Race for Life’); (15) bison and grizzly bear (‘Rival Monarchs”’).] 
Anon. Have animals souls? Am. Sports. Dec. 19, 1874. 
{From Atlantic Monthly.) 
dnon. Longevity of animals. < Am. Sports. Mar. 7, 1874. 
1875.—Sclater, P.L. On several rare or little-known mammals now or lately living in the Society’s 
Collection. < Proe. Zool. Soe. London, 1875, pp. 417-423, pl. xlvii-li. 
1876.—Dana, J.D. Cephalization a fundamental principle in the development of the system of ani- 
mal life. < Amer. Journ. Sci. 3d ser. xii, Oct. 1876, pp. 245-251. 
Gill, T. On the “Prodromus methodi mammalium” of Storr. < Bull. Philos. Soc. of Wash- 
ington, Oct. 1574, pub. 1876, pp. 1-15; also published separately, 8°, 1 p.1., xv pp. 
{An elaborate exeursus on this extremely rare treatise. New generic names attributable to Storr are Pro- 
cebus, Phalanger, Meles, Gulo, Mellivora, Nasna, Procyon, Hywna, Glis, Lagomys, Procauia, Cataphractus, Pho- 
lidotus, Aries, Taurus, Diodon.] 
1877.—Garman, S. W. Ona variation in the colors of animals. < Proc. Amer. Assoc. Ady. Sci. xxv, 
1877, pp. 187-204, 
