CASTOROIDIDiE— CA8TOKOIDE8— C. OIIIOENSIS 



428 



.... Ill the Fibers, the pterygoid fossce are largely dcvolopcil, but the 

 entrance to the posterior nares has the same conformation as in tlin other 

 Rodents."* It is almost surprising, in view of Dr. Wyman's adniiral)le 

 memoir and excellent figures, that zoologists have so long overlooked the 

 important characters that distinguish Castoroides from all other Rodents.f 



CASTOROIDES OHIOENSIS Foster. 



SYNONYMY.J 



lExtitKt animal of tlu order Rodenlia FosTERt], Amer. Journ, Sci. and Arts, xxxi, 1837, 80, figs. 15-17 (first 

 desoiiptioD of the Nasbport spocimeus). Pabliahed anonymously. 



CotloroidM oAioeiui< Foster, beoond Rep. Oeol. of Ohio, lS3d, 81, and fig. (Nashpoit specimens),— Wyman, 

 Proo. Boat. 8oc.,ll, 1846, 138 (Clyde specimens).— H*ll, Proc. Bost. Boo. Nat. Hist., il, 184C, 107 

 (Clyde apeoimens ; geological position). — Haix and Wyman, Boston Jonrn. Nai. Hist., v, 

 1847, 385, pis. xxxvii-zsxis (Clyde specimens; geological position and description of a 

 sknll). — WuirrLESBY, Am. Journ. Sci. & Arts, 2d aer., v, 1848, 215 (geological position uf tlie 

 NaahpoTt speoioiens). — Wyman, ibid., x, 1850, (13, fig. 5 (lower jaw ; Hompbis specimen). — 

 Wyman, Proc. Beat. Soc, ill, 1850, 281 (same).- Agassiz, Proo. .\mer. Assoc. Adv. Sci., v, 1851 , 

 179 (Nashport specimens).— LeContk, Proo. Acad. Nat. Sci. Pbila., vi, 1852, 362 (Sbawneetown 

 apeoimens).— Bronn, Leth. Geog., Ib67, 1046, pi. lix, fig. 8. — Pictet, Traits de Paldout., i, 

 1853, 253,— Baikd, Mam. N. Amer., 1857, 362.- Lbidy, Holmes's Post-pliocene Fossils S. Car., 

 i860, 114 ; Proo, Acad. Nr.t, Sci. Phila., 1867, 97 ; Jonrn. Acad. Nat, Sci, Pbila., 2d aer., v, 1SC9, 

 405 (akall &om Coles County, Illinois). — Winohell, Amer. Nat., iv, 1870, 504 (Michigan), 



Catior {I^gonikeriHmt) ohtomeis DbKay, Nat. Hiat. N. Yark, ZoSI., i, 1842, 89. 



DESCRIPTION AND HISTORY. 



The so-called " Fossil Beaver " of North AmeriCsi was of about the 

 size of a full-grown common Black Bear ^ Z^rsus americanus), hence some- 

 what exceeding in size the Capybara, the largest of existing Rodents. 



•Boston Jonrn. Nat, Hist,, vol. v, p, 399, 



t Even Mr, E, R, Alston, in his recent paper on " The Classifioation of the Order Glirea " (Proo, 

 ZoSl, Boo, Lond., 1876, p. 79), plaoea Cattoroidet in the family Cattoridai. 



t The following are the titles of, or references to, aome of the apecial papers treating ot CaaloroideB : 

 1837— [Foster (J, W.). Extinct Animal of the Order Rodentia.] < Amer. Journ, Sci and Arts, xxxi, 



1837, 80, figs. 15-17, 

 ia38— Foster (J. W.). [Description of Castoroides Ohioensis.] < Second Rep. Qeol. of Ohio, 1838, 



80-83, fig, 140. 

 1846— Wyman (J.). [Oi "'astoroidea Ohioensis,] Proc, Bost. Soc. Nat. Hist., ii, pp. 138, 1S9, 

 1846 — Hall (J,;. [Ou Geological Relations of the Fossil Castoroides Ohioensis,] < Proc, Boat, Soc, 



Nat, Hist., .1.167,168. 

 1847 — Hall (J.) and Wihak (J Notice of the Geological Position of the Cranium of the Caotoroides 



Ohioensis, By Jan..jd Hall, esq, . , . Also an Anatomical Description of the same. By 



Jeffries Wyman, < Boat. Jonrn. Nat, Hiat., vol, v, art. xxix, pp. 385-401, pll. 37-39, 

 1850— Wyman (J.), [On b Lower Jaw of Castoroides Ohioensis,] < Proc, Bost. Soc. Nat, Hist., iii, p. 281, 

 1852 — LeContb(J.). [Remarks on a New Locality — Shawner'own — forCaatoroidi i)''.';ioenai8,] < ''roc. 



Phila. Acad, Nat, Sci., vi, p. 53, 

 1807— Lbidy (J,). [On a Skull of Caatoroidea fonnd near Charleston, III.] < Proo. Phila. Aoad, Nat, 



8oi,, 1887, pp. 97, 98, 





