280 CALIFORNIA ACADEMY OF SCIENCES. 



BATHYURELLUS. BATHYUKUS. 



MARGINATUS Bill., 1865; Pal. Foss., vol. 1, p. 261, tig. 248. cf. B. 



nitidus aud B. expansus Bill. Ke^jpel Island, Port aux Choix aud 

 Table Head, N. F. Calciferous. 



NiTiDUS Bill., 1865; Pal. Foss., vol. 1, p. 265, tig. 249. Cow Head, 



N. F. On page 320 Mr. Billings says that it may be found neces- 

 sary to unite B. nitidus, B. marginatus and B. expansus into one 

 sijecies. 



BARUS Bill., 1865; Pal. Foss., vol. 1, p. .'520, no tig. Point Levis, 



Quebec. 



[DkeUocephalus) truncatus Meek, 1873; 6th Ann. Eep. Geol. Survej- 



Territories, i^. 465 (no description given). 



VALiDUS Bill., 1865; Pal. Foss., vol. 1, p. 268, fig.. 252. Point Rich, 



N. F. 



[Asaphiscus) wheeleri. (See Asaphiscus vjheeleri.) 



Bathyuriscus Meek, 1873; 6th Ann. Eep. U. S. Geol. Survey Territories, 



p. 484. 

 Bathyurus i haydexi Meek, 1873; Gth Ann. Rep. U. S. Geol. Sur- 

 vey Territories, p. 482. Gallatin River, Gallatin City, Mont. 



HAYDENi Wal., 1886; Bull. U. S. Geol. Survey, No. 30, p. 215. 



HOWELLi Wal., 1886; Bull. U. S. Geol. Survey, No. 30, p. 216, pi. 30, 



figs. 2, 2 a. Chisholm Mine, near Pioche, Nev. Taconic. 



Syn., EmhoUmus rotundattis (Rominger) Walcott, 1888; Am. Jour. 



Sci., 3d series, vol. 36, p. 165, referred to Bathyuriscus hovjclU. 

 Ogygia parabola H. & W., 1877; U. S. Geol. Expl. 40th Par., vol. 



4, p. 245, pi. 2, fig. 35. Oquirrh Mts., Utah. Niohc parabola. 



Taconic. 

 Ogygia prodccta H. & W., 1877; U. S. Geol. Expl. 40th Par., vol.4, 



p. 244, pi. 2, figs. 31-34. Oquirrh Mts., Utah. Taconic. 

 PRODUCTA Wal., 1886; Bull. U. S. Geol. Survey, No. 30, p. 217, pi. 30, 



figs. 1, 1 a-c. Big Cottonwood Canon, Citj' Creek, Wahsatch Mts., 



etc., Utah. 

 Bathyurus Bill., 1859; Canadian Naturalist, vol. 4, p. 364. 

 AMPLiMARGiNATUs Bill., 1857; Canadian Naturalist, vol. 4, p. 365, fig. 



12 a-b. Mingan Islands iu the Calciferous. 



AMPLIMARGINATUS Bill., 1863; Geol. Canada, p. 122, fig. 41. 



AMPLIMARGINATUS Bill., 1865; Pal. Foss., vol. 1, p. 353, fig. 341 a. 



ANGELiNi Bill., 1859; Canadian Naturalist, vol. 4, p. 467, fig. 37. cf. 



B. extans Hall. Grenville and Fitzroy Harbor. Chazy group. 



ANGELINI Bill., 1863; Geol. Canada, p. 133, fig. 68. 



ARCUATus Bill., 1865; Pal. Foss., vol. 1, p. 205, fig. 190. St. Autoiue, 



Quebec. 

 ARMATus Bill., 1860; Canadian Naturalist, vol. 5. p. 319, fig. 23. 



Point Levis, Quebec. 

 ARMATUS Bill., 1865; Pal. Foss., vol. 1, p. 411, fig. 392. 



