398 CALIFORNIA ACADEMY OF SCIENCES. 



LEPERDITIA. 



SCALARIS (Leperditia gibbera var. scalaris Jones, 1858); Annals Mag. 



Nat. Hist. London, 3d series, vol. 1, p. 250, pi. 10, figs. 7-9. 



Waterlime. 



SELWYNII Jones, 1891; Contrib. Micro-Palaeont., pt. 3, p. 89, pi. 12, 



figs. 1-5. Div. 2, Anticosti group, Jupiter River. Anticosti. 



SENECA Hall, 1861; Des. New Species Foss., p. 84. Hamilton. 



SENECA Hall, 1862; 15th Rep. New York State Cab. Nat. Hist., p. 



112. Ontario Co., N. Y. . Hamilton. 



- SENECA Jones, 1890; Quart. Jour. Geol. Soc., vol. 46, p. 23, pi. 1, figs. 



13, 14. 



SINUATA Hall, 1860; Canadian Naturalist, vol. 5, p. 158. 



Upper Silurian. 



SINUATA Daw., 1868; Acadian Geology, p. 609, fig. 217. 



SINUATA Jones, 1990; Quart. Jour. Geol. Soc., vol. 46, p. 24, pi. 1, 



figs. 12 a, c. Arisaig, Nova Scotia. 



SPINULIFERA Hall, 1861; Des. New Species Foss., p. 83. Corniferous. 



- SPINULIFERA Hall, 1862; 15th Rep. New York State Cab. Nat. Hist., 



p. 111. Ontario Co., N. Y. Hamilton. 



Cythere SUBL^EVIS Shum., 1855; 1st and 2d Ann. Rep. Geol. Survey 



Missouri, p. 195, pi. B, fig. 15. Lower Magnesiau. 



SUBCYLINDRICA Ulrich, 1889; Contrib. Micro. Palseont., pt. 2, p. 49, pi. 



9, figs. 4, 4 b. Stony Mountain, Manitoba. Cambrian. 



SUBQUADRATA Jones, 1889; The American Geologist, vol.4, p. 340, pi., 



figs. 4 a-d. Perry Co., Penn. Lower Helderberg. 



- SULCATA Ulricli, 1892; The American Geologist, vol. 10, p. 266, pi. 



9, figs. 19 to 23; also var. VENTRICORNIS. High Bridge, Ky. 



Birdseye. 



? SUBROTUNDA Ulrich, 1890; Jour. Cincinnati Soc. Nat. Hist., vol 13, 



p. 181, pi. 18, figs. 1, 1 a-c. Falls of the Ohio. Devonic. 



troyensis Ford. (See Aristozoe troyensis.) 



TUMIDA Ulrich, 1892; The American Geologist, vol. 10, p. 264. High 



Bridge, Ky. Birdseye. 



TUMIDULA Ulrich, 1890; Jour. Cincinnati Soc. Nat. Hist., vol. 13, p. 



175, pi. 11, figs. 4, 4 a-c. Danville, Ky. Trenton. 



TURGIDA Bill., 1865; Palaeozoic Foss. Canada, vol. 1, p. 299. Portaux 



Choix, Cape Norman, N. F. 



UNICORNIS Ulrich, 1879; Jour. Cincinnati Soc. Nat. Hist., vol. 2, p. 



10, pi. 7, figs. 4, 4 a, b. One and a half miles west of Coviugton, 

 Ky. Referred by Prof. T. R. Jones to Primitia unicornis. 



Hudson. 



VENTRALIS Bill., 1865; Palaeozoic Foss. Canada, vol. 1, p. 300. 



Bonne Bay, N. F. 



- WHITEAVESII Jones, 1891; Contrib. Micro-Palaeont., pt. 3, p. 87, pi. 



12, figs.. 11-14, woodcut fig. 6. Cedar Lake. Silurian. 



