1042 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
1845.—Brandt, J. F. Observationes ad structuram cranii Rhytine stelleri spectantes. < Bull. Acad. 
Sci. St. Pétersb. iv, 1845, col. 135-138. 
Stannius, F. H. Beitriige zur Kenntniss der Amerikanischen Manatis. 4°. 38 pp., 2 pll 
Rostock, 1845. 
1847.—Perkins, G. A. [Description of a West African manatus.] < Proc. Boston Soc. Nat. Hist. ii, 
1847, pp. 198,199. [Named by J. Wyman, in a foot-note, M. nasutus. } 
1849.—Agassiz, L. [On some points of resemblance between the skulls of Manatus and Mastodon. ] 
< Proce. Boston Soe. Nat. Hist. iii, 1849, p. 209. 
Brandt, J. F. Symbol sirenologice [fasciculus i], quibus praecipue Rhytinw historia natu- 
ralis illustratur. <Mém. Acad. Imp. Sci. St. Pétersb. 6e sér, 2e partie, Sciences naturelles, t. 
vii, 1849, Zoologie et physiologie, pp. 1-160, pll. 1-5. [See also 1861-68.] _ 
Warren, J. C. [Presentation of the stuffed skin and skeleton of an Ameriean manati.} 
< Proce. Boston Soe. Nat. Hist. iii, 1849, p, 199. 
Wyman, J. [Description of the Manatus nasutus.] < Proc. Boston Soc. Nat. Hist. iii, 1849, 
p. 192. 
1850.—Kneeland, S., jr. The Manatus not a cetacean but a pachyderm. < Proc. Am. Assoc. Ady. 
Sci. iii, 1850, pp. 42-47. 
Wyman, J. Notice of the cranium of the ne-hoo-le, a new species of manatee (Manatus nasu- 
tus), from West Africa. < Am. Journ. Sci. and Arts (2), ix, 1850, art. ix, pp. 45-47. 
1851.—Vrolik, W. Bijdrage tot de natuur- en ontleedkundige kennis van den Manatus americanus. 
< Bijdr. tot de Dierkunde, i, Afd. viii, 1851, pp. 53-80, 6 pll. 
1857.—Gray, J. E. Observations on the species of the genus Manatus. < Proc. Zool. Soc. London, 
xxv, 1857, pp. 59-61. 
Rapp, W.von. Anatomische Untersuchungen iiber Manatus (Lamantin). < Wiirttemb. natur- 
wiss. Jahresh. 13. Jahrg. 1857, pp. 87-98, 1 pl. 
1858.—Krauss, F. Beitriige zur Osteologie des surinamischen Manatus. < Miiller’s Arch. f. Anat. 1858, 
pp. 390-425, 
1861-68.— Brandt, J.F. Symbol sirenologice. Fascieulusiietiii. Sireniorum, pachydermatum, zeu- 
glodontum et cetaceorum ordinis osteologia comparata, nec ncn sireniorum generum monogra- 
phiew. ... Petropoli, 1861-68. [4°. 3 p.1., 383 (+1) pp., 9 pll.] <Mém. Acad. Imp. Sci. 
St. Pétersb. Ge série, Sciences naturelles, pp. 1-365, 19 pll. [Tor fase. i, see 1849.] 
1862.—Krauss,—. [Description of two skeletons and a skull of Manatus from Surinam.] < Reich. & 
Dua Bois Raym. Arch. 1862, p. 415. ; 
1863.—Brandt, J. F. Bemerkungen iiber die Verbeitung und Vertilgung der Rhytina. < Bull. Acad. 
ci. Pétersb. v, 1863, col. 558-564. 
Brandt, J.F. Bemerkungen iiber die Zahl der Halswirbel der Sirenien. < Bull. Acad. Sci. St. 
Pétersb. v, 1863, col. 7-10. f 
Brandt, J.F. Einige nachtriigliche Worte iiber die Nasenbeine der Sirenien. < Bull. Acad. 
Sci. St. Pétersb. vi, 1863, col. 111-115. 
Brandt, J. F. Winige Worte iiber die verschiedenen Entwickelungsstuien der Nasenbeine der 
Seekiihe. < Bull. Acad. Sci. St. Pétersb. v, 1863, col. 10-12. 
Brandt, J. F. Quelques mots sur une ostéographie des sirénes, accompagnées d’une ostéologie 
des pachydermes et des cétacés. < Comptes Rendus, Paris, lvii, 1863, pp. 489, 490; Rev. Zovlo- 
gique, xv, p. 345; Ann. Nat. Hist. xii, p. 406. : é 
Nordmann, A. von. [Contribution to a knowledge of the osteological structure of Rhytina 
stelleri.] < Act. Soc. Sci. Fennicx, vii, 1863, pp. 1-33, with 5 pll. _ 
1864.—Flower, W. H. Note on the number of the cervical vertebrie in the Sirenia. < Nat. Hist. Rev. 
1864, pp. 259-264. - 
Latimer, G. Letter offering to forward manatees for the society’s menagerie. < Proc. Zool. 
Soc. London, 1864, pp. 167,168. [Contains information respecting habits. ] 
1865.—Gray, J E. On the species of manatees (Manatus), and on the difficulty of distinguishing such 
species by osteological characters. < Ann. and Mag. Nat. Hist. xv, Feb. 1865, pp, 130-139. 
1866.—Brandt, J. F. Noch einige Worte iiber die Vertilgung der Rhytina. < Bull. Acad. Sci. St. 
Pétersb. ix, 1866, pp. 279-282. 
