676 BULLETIN i>2, UNITED STATES NATIONAL MUSEUM. 



Isotelus beta Raymond. 



AeaphuB ep. beta Raymond, Ann. Carnegie Mus., 3, 1905, p. 342, pi. 12, fig. 9. 

 Isotelus beta Raymond, 7th Rep. Vermont State Geol., 1910, pi. 36, fig. 9, pi. 39, 



figs. 4-7; Ann. Carnegie Mua., 7, 1910, p. 67, pi. 19, figs. 4-7. 

 Chazyan (Crown Point, Valcour): Crown Point, Valcour Island, Plattebuigh, and 



Chazy, New York. 



Isotelus canalis Hall. 



Isotelus canalis (Conrad MS.) Hall, Pal. New York, 1, 1847, p. 25, pi. 4 (bis), 

 figs. 17-19.— Emmons, Amer. Geologj-, 1, pt. 2, 1855, p. 2,36, pi. 3, figs. 17-10. 

 Asaphus canalis Hall, 12th Rep. New York State Cab. Nat. Hist., 1859, p. 70 

 (gen. ref.).— Billings, Pal. Foes., 1, Geol. Surv. Canada, 1865, p. 270, figs. 255a, 

 b; p. 352, fig. 340. 

 Chazyan: Chazy, New York; Newfoundland. 

 Observation. — Neither defined nor figured so aa to be recognized. 



Isotelus canalis Clarke. See Isotelus gigas. 



Isotelus canalis Grabau and Shimer. See laoteloides whitfleldi. 



Isotelus canalis Weller. See Asaphellus gyracanihus. 



Isotelus coTlngtonensis Ulrich. 



Isotelus covingtonensis Ulrich in Foerste, Jour. Cincinnati Soc. Nat. Hist., 21, 



1914, p. 145, figs. 1, 2. 

 Trenton (Upper): Covington, Rogers Gap, etc., Kentucky. 



Isotelus Cyclops Green. 



Isotelus Cyclops Green, Monthly Amer. Jour. Geol., 2, 1832, p. 560, pi., fig. 7; 



Mon. Tril. N. A., 1832, p. 69, fig. 7, cast 24. 

 Middle Ordovician: Western New York. 

 Plastotypc—Gsit. No. 25703, U.S.N.M. 



Isotelus emoryx Walcott. See Onchometopus emoryi. 



Isotelus Florence villensis Calvin. See Onchometopus siisae. 



Isotelus gigas of authors. See Isotelus jacobus, I. latus, and I. iowensifl. 



Isotelus gigas deKay. 



Isotelus gigas DeKay, Annals Lyceum Nat. Hist. New York, 1, 1824, p. 176, pi. 

 12, fig. ] ; pi. 13, fig. 1.— Green, Monthly Amer. Jour. Geol., 1832, p. 560; Mon. 

 Tril. N. A., 1832, p. 71, cast 21, 22.— Milne-Edwards, Crust., 3, 1840, p. 298.— 

 Troost, 5th Geol. Rep. Tennessee, 1840, p. 57. — Vanuxem, Nat. Hist. New 

 York, Geol., 3, 1842, p. 47, fig. 1.— Emmons, ibid., 2, 1842, p. 389, fig. 1.— 

 Mather, ibid., 1, 1843, p. 397, fig. 1.— Goldfiiss, Neues Jalirb. f. Min., etc., 

 1843, p. 554.— Owen, Amer. Jour. Sci., 47, 1844, p. 363, fig. 1.— Hall, Pal. 

 New York, 1, 1847, p. 25, pi. 4 (bis), fig. 16; p. 231, pi. 60, figs. 7a-i; pi. 61, 

 figs. 3a-f, 3i-m, 4a-c; pi.' 62, figs, la-c, 2; pi. 63; also p. 254, pi. 66, fig. 5.— 

 Emmons, Amer. Geology, 1, pt. 2, 1855, p. 215, pi. 16, figs. 9-12.— Billings, 

 Canadian Nat. Geol., 1, 1856, pp. 45, 46, figs. 9, 11.— Rogers, Geol. Pennsyl- 

 vania, 2, pt. 2, 1858, p. 819, fig. 610.— Emmoivi, Man. Geol., 1860, p. 100, 

 fig. 89.— Lincklaon, 14th Rop. New York State Cab. Nat. Hist., 1861, pi. 3, 

 fig. 11.— Hitchcock, Geol. Vermont, 2, 1862, pi. 12, fig. 5.— Chapman, Expos. 

 Min., Geol. Canada, 1864, p. 136, fig. 140.— Tx'sley, Geol. Surv. Penns>'lvania, 

 Rep. P 4, 18S9, p. 302, figs.— Clarke, Geol. Minnesota, 3, pt 2, 1894, p. 701, 

 figs, ft-8; p. 706.— Schuchert, Proc. U. S. Nat. Mue., 22, 1900, p. 174.— Weller, 

 Geol. Surv. New Jersey, Pal., 3, 1903, p. 192, pi. 14, figs. 6, 7.— Grabau and 

 Shimer, N. A. Index Foeeils, 2, 1910, p. 292, fig. 1601.— Raymond, Ann. 



