1024 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
1840.—Lichtenstein, K.M.H. Mittheilung iiber mehrere im nérdlichen America gefundene Pachy- 
' dermen [Ungulata]. < Isis von Oken, 1840, col. 903-906. 
Cgilby, W. [Monograph of the hollow-horned ruminants: abstract.] < Proc. Zool. Soc. 
Loudon, viii, 1840, pp. 4-10. 
1840-43.—Gulliver, G. Observations on ihe blood corpuscles of certain speeies of the genus Cervus. 
< Philos. Mag. xvii, 1840, pp. 327-331; Institut, viii, no. 341, 1840, p. 234; Abstracts of the 
Papers read before the Royal Soc. London, iv, 1843, p. 199. 
1841.—Blyth, BE. Ap amended list of species of the genus Ovis. < Ann. Mag. N. H. vii, 1841, p. 195. 
Wyman, J. [On four-horned and Fezzan sheep.] < Proc. Boston Soc. Nat Hist. i, 1841, p. 3. 
1842.—Haldeman, S.S. [On changes of nomenclature in natural history.] < Proc. Acad. Nat. Sci. 
Phila. i, 1842, pp. 187, 188. 
[Aplocerus proposed as a substitute for Mazama, Smith.) 
Jackson, J.B.S. Dissection of two adult dromedaries, a male and a female. < Boston Journ. 
Nat. Hist. iv, no. 1, Jan. 1842, art. i, pp. 1-16. 
1843.—Blom, G. P. On the reindeer of the Laplanders. < Edinb. New Phil. Journ. xxxiv, 1843, pp. 
352-359; Fror. N. Not. xxvi, no. 562, 1843, pp. 177-183. 
1844-45.—Sundevall, C.J. Methodisk éfversigt af Idislande djuren (Pecora, Linn.). < K. Sv. Vet. 
Akad. Handl. (Stockholm), 1844, pp. 121-210; 1845, pp. 265-330; Ofversigt K. Vet. Akad. Forh. 
(Stockholm), iv, 1846, p. 57; Oken, Isis, 1846, col. 564-599; Hornschuch, Archiv, ii, 1850, pp. 
78-160, 261-320. 
1845.—Rapp, W. von. Ueber die Erniihrung des Fétus der Wiederkiiuer. < Wiirtembg. naturwiss. 
Jabresh. 1, Heft 1, 1545, pp. 67-69. 
Rapp, W.von. Ueber die Ziihne des Hirsches. < Wiirttemb. naturwiss. Jahresh. 1. Jabrg. 1. 
Heft, 1845, pp. 64-66, 
Sundevall, C.J. Ofversigt af diiggdjursordningen Pecora. < Ofversigt K. Vet. Akad. Forh. 
(Stockholm), ii, 1845, pp. 26-32 ; 
1846.—Agassiz, L. [Remarks on the moose and caribou (Cervus alces and tarandus, auct).] < Proc. 
Boston Soc. Nat. Hist. ii, 1846, pp. 187, 188. 
Gray, J,.E. On the arrangement of the hollow-horned ruminants (Bovide). < Ann. Nat, 
Hist. xviii, 1846, pp. 227-233. 
Weissenborn, W. Ueber die Identitiit des Urns und Bison. < Fror. N. Not. xl, no. 867, 1846, 
pp. 129-134; no. 868, pp. 145-150. 
1847.—Agassiz, L. On the moose and carabou, and on the American raven. < Am. Journ. Sci. and 
Arts (2), iii, 1847, p. 436. 
Holmes, F.S. Description of bezoar stone found in the stomach of a buck (Cervus virginianus, 
Gm.). < South. Journ. Med. Charleston, ii, 1847, pp. 527-530. 
Jager, G. von. Ueber die Identitiit und Unterscheidung des Auerochsen, Bos urus, und des Bi- 
son, Bos bison. <( Wiirttemberg. Jahreshefte, iii, 1847, pp. 176-178. 
Leidy, J. On a new genus and species of fosi] ruminants (Poébrotherium wilsoni). < Proc. 
Acad. Nat. Sci. Phila. iii, 1847, pp. 322-326, pl—; < Am. Journ. Sci. and Arts (2), v, 1348, 
pp. 276-279. 
Thompson, P. T. Hippopotamus at Sierra Leone. < Am. Journ. Sci. and Arts (2), iii, 1847, p. 
125: 
1847-48.—Pucheran, J. Monographie du genre cerf. < Comptes Rendus, Paris, xxiv, 1847, pp. 604, 
605; xxvi, 1848, p. 500. 
1848.—Gray, J.B. Description of a new species of antelope from West Africa. < Am. Journ. Sci. and 
Arts (2), v, 1848, pp. 279-280. 
Leidy, J. Ona new fossil genus and species of ruminantoid pachydermata: Merycoidodon cul- 
bertsonil. < Proc. Acad. Nat. Sci. Phila. iv, 1848, pp. 47-50, with pl. 
Meckel, H. Ueber die Eutwickelung der Geschlechtstheile des Schafes [Ovis]; mit Riicksicht 
auf die abnormen Bildungsverbiltnisse. < Zeitg. Zool. i, 1848, pp. 93-97, 101-106. 
Numan, A. Bijdrage tot de ontleedkundige en physiologische kennis der horens van het rund- 
vee. <N. Verhandl. 1, KL. Nederl. Instit. D. 13, 1848, pp. 185-266, 4 pll. 
1849.—Duvernoy, G.L. Rapport sur Vouvrage de §. G. Morton. Observations additionelles sur une 
nouvelle espéce a’hippopotame. < Institut, xvii, no. 820, 1849, p. 299. 
