BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 1273 



THALEOPS Conrad. Genotype: T. ovatus Conrad. 



Thaleops Conrad, Proc. Acad. Nat. Sci. Philadelphia, 1, 1843, pp. 331-2. Hall, 

 Pal. New York, 1, 1847, p. 259. Clarke, Geol. Minnesota, 3, pt. 2, 1897, 

 p. 716. Raymond and Narraway, Ann. Carnegie Mus., 4, 1908, p. 247. 

 Grabauand Shinier, N. A. Index Fossils, 2, 1910, p. 298. Slocom, Field Mus. 

 Nat. Hist., Geol. Ser., 4, 1913, p. 56. Raymond, Zittel-Eastman Textb. Pal., 

 1913, p. 720. 



Thaleops arctums (Hall). 



Illsenus arcturus Hall, Pal. New York, 1, 1847, p. 23, pi. 4 (bis), fig. 12. Emmons, 



Amer. Geology, 1, pt. 2, 1855, p. 235, pi. 3, fig. 12. Billings, Canadian 



Nat. Geol., 4, 1859, p. 379. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 



1889, p. 299, figs. 

 Thaleops arctura Clarke, Geol. Minnesota, 3, pt. 2, 1897, p. 718. Raymond and 



Narraway, Ann. Carnegie Mus., 4, 1908, p. 248, pi. 61, fig. 8. Raymond, Ann. 



Carnegie Mus., 7, 1910, p. 71; 7th Rep. Vermont State Geol., 1910, p. 227, 



pi. 35, fig. 5. Grabau and Shimer, N. A. Index Fossils, 1910, p. 298, fig. 



1605b. 

 Thaleops ovatus Raymond, Bull. Amer. Pal., 3, 1902, pi. 18, fig. 9; Ann. Carnegie 



Mus., 3, 1905, p. 352, pi. 13, fig. 5. 

 Chazyan (Day Point Valcour): Chazy, Crown Point, Valcour, etc., New York; 



Isle La Motte, Vermont. 



Thaleops clavifrons (Billings). 



Illsenus clavifrons Billings, Canadian, Nat. Geol., 4, 1859, p. 379. 

 Chazyan (Mingan) : Mingan Islands, Canada. 



Thaleops ovatus Conrad. 



Thaleops ovata Conrad, Proc. Acad. Nat. Sci., Philadelphia, 1, 1843, p. 332. 

 Clarke, Geol. Minnesota, 3, pt. 2, 1897, p. 716, fig. 25-28. Ruedemann, Bull. 

 New York State Mus., 49, 1901, p. 62. Raymond and Narraway, Ann. Car- 

 negie Mus., 4, 1908, p. 247, pi. 60, figs. 11-13; pi. 61, figs. 6, 7. Grabau and 

 Shimer, N. A. Index Fossils, 2, 1910, p. 298. Slocom, Field Mus. Nat. Hist., 

 Geol. Ser., 4, 1913, p. 56, pi. 14, figs. 6-8. 



Thaleops (Illsenus) ovatus Hall, Pal. New York, 1, 1847, p. 259, pi. 67, figs. 6a, b; 

 p. 318, pi. 67, fig. 6c. 



Illsenus ovatus Hall, 12th Rep. New York State Cab. Nat. Hist., 1859, p. 76 (gen. 

 ref.). Billings, Canadian Nat. Geol., 4, 1859, p. 376 (loc. occ.). Whitfield, 

 Geol. Wisconsin, 4, 1882, p. 238, pi. 5, figs. 1, 2. Chamberlin, Geol. Wiscon- 

 sin, 1, 1883, p. 160, fig. 



Illsenus herricki Foerste, 15th Ann. Rep. Geol. Nat. Hist. Surv. Minnesota, 1887, 

 p. 479, fig. 2. 



Black River: Mineral Point, Beloit, Wisconsin; Dixon, Illinois; Minneapolis, 

 Minnesota (Platteville) ; Ottawa, Ontario. 



?Richmond (Maquoketa): Clermont, Iowa. 



THALEOPS OVATUS Raymond. See Thaleops arcturus. 



Thaleops? pterocephalus (Whitfield). 



Illaanus pterocephalus Whitfield, Ann. Rep. Geol. Surv., 1878, p. 87; Geol. 



Wisconsin, 4, 1882, p. 309, pi. 20, figs. 10-12. 

 Niagaran (Racine): Pewaukee, Wisconsin. 



Thaleops vindex (Billings). 



Illsenus vindex Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 179, figs. 



160a, b. Raymond, Ann. Carnegie Mus., 3, 1905, p. 353, fig. 2. 

 Chazyan (Mingan): Mingan Islands, Canada. 



