280 CALIFORNIA ACADEMY OF SCIENCES. 



BATHYUKELLUS. BATHYURUS. 



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



nitidus and B. expansus Bill. Keppel Island, Port aux Choix and 

 Table Head, N. F. Calciferous. 



- NITIDUS Bill., 1865; Pal. Foss., vol. 1, p. 265, fig. 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 

 species. 



RARUS Bill., 1865; Pal. Foss., vol. 1, p. 320, no fig. Point Levis, 



Quebec. 



(Dicellocephalus) TRUNCATUS Meek, 1873; 6th Ann. Kep. Geol. Survey 



Territories, p. 465 (no description given). 



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



N. F. 



(Asaphiscus) wheeleri. (See Asaphiscus ivheeleri.) 

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



p. 484. 



Bathyurus ? HAYDENI Meek, 1873; 6th Ann. Rep. U. S. Geol. Sur- 

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



- HAYDENI Wai., 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. 



Syii., Embolimus rotundatus (Roniinger) Walcott, 1888; Am. Jour. 

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



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



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



Taconic. 



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

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



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



figs. 1, 1 a-c. Big Cottoiiwood Canon, City 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 in the Calciferous. 



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



AMPLIMARGIXATUS 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. Antoine, 



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. 



