1050 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
1851.—Leidy, J. [On two fossil miocene species of Balwna—B. paleatlantica, B. prisca.] < Proc. 
Acad. Nat. Sci. Phila. v, 1851, pp. 308, 309. ; 
Miiller, J. Avar-cranium.—Zeuglodon. < Ofversigt K. Vet. Akad. Forhendl. Stockholm, 1851, 
pp- 126, 127. 
Miiller, J. Zur Kenntniss der Zeuglodonten. < Bericht. Verh. K. Pr. Akad, Wiss. Berlin, 1c51, 
pp. 236-246. 
1852.—Gray, J. E. Observations on Hyperoodon latifrons. < Ann. Nat. Hist. ix, 1852, pp. 407-410. 
Leidy, J.” [Remarks on a fossil Delphinus (D. conradi) from the miocene of Virginia, and a 
foss'] crocodilian reptile from New Jersey.] < Proc. Acad. Nat. Sci. Phila. vi, 1852, p. 35. 
1853.—Cabot, S. [Ona deformity in the lower jaw ofa spermaceti whale.] < Proc. Boston Soc. Nat. 
Hist. iv, 1853, p. 360, 
Claudius, M. Diss. de Lagenorhynchis. 4 pp. Kili, C. F’, Mohr, 1853-54, 
Gervais, P. Description de quelques especes de phoques et de cétacés. < Ann. Sci. Nat. xx 
(Zool.), 1853, pp. 281-292. 
lkeidy, J. [Observations on the remains of extinct Cetacea and Pinnipedia from the green-sand 
of New Jersey and from South Carolina and Virginia.] < Proc. Acad. Nat. Sci. Phila. vi, 
1853, pp. 377, 378. 
Owen, R. Baleen.—Whalebone, < Ann. Sci. i, 1853, pp. 167, 168. 
{Prof. Owen’s lecture—Society of Arts.] 
Owen, R. Note on the transverse processes of the two-toothed Dolphin (Hyperoodon bidens). 
< Ann. Nat. Hist. 2d ser. xi, 1853, pp. 435, 436. 
Rehiiller, M. On the capture of Delphinus orca in South Greenland. < Proce. Zool. Soc. Lon- 
don, xxi, 1853, 103. 
1854.—Thompson, W. On the oceurrence of the bottle-headed whale, Hyperoodon bidens, Flem., 
and remarks thereon. < Ann. Nat. Hist. 2d ser. xiv, 1854, pp. 347-350. 
Warren, J. C. [Historical sketch of Zeuglodon.] < Proc. Boston Soc. Nat. Hist. v, 1854, pp. 
192% 
1855.—Hamel, J. The whale-killer, or thresher, mentioned by Tradescant in the journal of his voy- 
age to Russiain 1618. < Proce. Am. Assoc. Adv. Sci. vii, 1855, pp. 258-271. 
Mayer, F. J.C. Ueber die Structur der Hautbedeckungen der Cetaceen. < Nova Acta Acad, 
Leop. Carol. Nat. Cur. xxv, pt. i, 1855, pp. 449-476, 3 pll. 
1856.—Heddle, R. On the whale of the genus Physalus Gray [Balwenoptera] (Ph. duguidii) captured 
in Orkney. < Proce. Zool. Soc. London, xxiv, 1856, pp. 187-198, 2 pll. 
Pucheran, J. Note sur les caracttres zoologiques de quelques espéces de cétacés. < Comptes 
Rendus, xlii, 1856, pp. 445, 446. 
Pucheran, J. Notices mammalogiques (cétacés). < Rev. et Mag. Zool. viii, 1856, pp. 144-149, 
315-321, 362-369, 449-460, 545-552. 
Rousseau, L. F. EB. De la dentition des cétacés, et de la place qu’occupent les fanons dans la 
bouche des baleines. < Revue et Mag. de Zool. 2e sér. viii, 1856, pp. 193-208, 257-260, 305-311, 
353-362. 2 
1857.—Beneden, P. J. van. Sur une baleine prise prés de V’ile Vlieland et dont le squelette est monté 
au Jardin Royal de Zoologie d’Anvers, Pterobaleena communis [ Baleenoptera rostrata]. < Bull. 
Acad. Brux. 2e sér. i, 1857, pp. 390-403. 
Jager, G. von. Bemerkungen iiber die Veriinderung der Ziihne von Siiugethieren im Laufe 
ihrer Entwickelung, namentlich bei dem Narwhal (Monodon monoceros), und dem Cachalot 
(Physeter maecrocephalus). < Bull. Soc. Nat. Moscou, xxx (pte. 2), 1857, pp. 571-580. 
Wyman, J. [On the eye of a sperm whale.] < Proce. Boston Soc. Nat. Hist. vi, 1857, pp. 125, 
126. 
1858.—Bouvé, T. T. [On Zeuglodon cetoides.] < Proc. Bost. Soc. Nat. Hist. vi, 1858, pp. 421, 422. 
1859.—Knox, R. Contributions to the anatomy and natural history of the cetacea. < Linn. Soc. 
Journ. iii, 1859 (Zool.), pp. 63-76. ¥ 
1860.—Atwood, N. BE. [On finback and sperm whales.] < Proc. Boston Soe. Nat. Hist. vii, 1860, p. 
226. 
