CATAIAXil'K OP' TKILOHITES. 317 



PTYCHASPIS. PTYCHOPARIA. 



MiNUTA Whitf., 1882; Geol. Wisconsin, vol. 4, p. 186, pi. 1, figs. 25, 26. 



MINDTA Wal., 1884; Pal. Eureka Dist., Mon. U. S. Geol. Survey, 



vol. 8, p. 60, pi. 10, fig. 23. 



PDSTin.o.SA H. & W., 1877; U. S. Geol. Expl. 40th Par., Palaeont, vol. 



4, p. 223, pi. 2, fig. 27. Taconic. 



Dkellocephalus SESOSTRis Bill., 1865; Pal. Foss., vol. 1, p. 198, fig. 

 184. Point Levis, Quebec.^ 



SPECiosus Wal., 1879; 32d Eep. New York State Mus. Nat. Hist., p. 



131. CalciferouH. 



STRIATA Whitf., 1878; Ann. Eep. Geol. Survey Wisconsin, 1877, p. 



55. Taconic. 



STRIATA Whitf., 1880; Ann. Rep. Geol. Survey Wisconsin, 1879, p. 51. 



STRIATA Whitf., 1882; Geol. Wisconsin, vol. 4, p. 186. 



Syn., granulosa Hall, 1863; 16th Rep. New York State Cab. Nat. Hist., 



p. 173, pi. 6, figs. 33-40. Not P. granulom Owen. 

 Arionellus subclavatus Bill., 1860; Canadian Naturalist, vol. 5, p. 

 315, ligs. 15, 15 a. Point Levis, Quebec. 

 PTYCHOPARIA Cord., 1847; Prodr., p. 141, pi. 2, fig. 11. 



Conocephalites adamsi Bill., 1861; Pamphlet published in adv. Pal. 

 Foss., p. 12, fig. Highgate, Vermont. Taconic. 



Conocephalus Adams, 1848; Am. Joiir. Sci., 2d series, vol.5, p. 109. 

 Conocephalites adamsi Bill., 1861; Geol. Vermont, vol. 2, p. 950, fig. 



355. 

 Conocephalus Bill., 1861; Am. Jour. Sci., 2d series, vol. 32, p. 231. 

 Conocephalus Bill., 1861; Canadian Naturalist, vol. 6, p. 324. 

 Conocephalites adamsi Bill., 1863; Geol. Canada, p. 286, fig. 294. 

 Conocephalites adamsi Bill., 1865; Pal. Foss., vol. 1, p. 12, fig. 15. 



ADAMSI Wal., 1886; Bull. U. S. Geol. Survey No. 30, p. 195, pi. 26, 



figs. 1, 1 a-c. 

 Syn., arenosus (Bill.) Wal., 1886; Bull. U. S. Geol. Survey No. 30. 

 p. 195. 

 Conoceph. arenosus Bill., 1861; Pamphlet published in adv. of 

 Pal. Foss. Canada, vol. 1; also Pal. Foss., vol. 1, p. 15, 

 fig. 18. 

 Conoceph. arenosus Bill., 1861; Geol. Vermont, vol. 2, p. 952, 



fig. 358. 

 Conoceph. areno.'ius Bill., 1863; Geol. Canada, p. 286, fig. 297. 

 Walcott (Bull. U. S. Geol. Survey No. 30, p. 195) refers this 

 species to Ptychoparia adamsi. 



ADAMSI Wal., 1890; 10th Rep. U. S. Geol. Survey, p. 649, pi. 96, figs. 



1, 1 a. Olenellus zone. 



Eutomai affinis, Wal , 1882; Pal. Eureka Dist., Mon. U. S. Geol. 



Survey, vol. 8, p. 54, pi. 10, fig. 12. Eureka Dist., Nev. 



Taconic. Cambrian. 



