366 CALIFORNIA ACADEMY OF SCIENCES. 



LEPERDITID^E. 



LEPERDITIA Rouault, 1851; Bull. Soc. Geol. France, 2d series, vol. 8, p. 



377. Cambrian. Carboniferous. 



ISOCHILINA Jones, 1858; Annals Mag. Nat. Hist., London, 3d series, vol. 



1, p. 248. Cambrian. Devonian. 



JONESELLA Ulrich, 1890; Jour. Gin. Soc. Nat. Hist., vol. 13, p. 121. 

 LEPIDITTA Matt., 1885; Trans. Eoy. Soc. Canada, vol. 3, p. 62. Para- 



doxides zone. Taconic. 



BEYRICHIDJE. 



BEYRICHIA McCoy, 1846; Synopsis Sil. Foss. Ireland, p. 57. 



Cambrian. Carboniferous. 



BEYRICHIELLA J. & K., 1886; Geol. Mag., new series, decade 3, vol. 3, p. 

 438. Carboniferous. 



BEYRICHIOPSIS J. & K., 1886; Geol. Mag., decade 3, vol. 3, p. 434. 



Carboniferous. 



KLCEDENIA Jones and Holl, 1886; Annals Mag. Nat. Hist., London, 5th 



series, vol. 17, p. 362. Silurian. 



HIPPONICHARION Matt., 1885; Trans. Eoyal Soc. Canada, vol. 3, p. 64. 



Paradoxides zone. Taconic. 



BEYRICHINA Matt., 1885; Trans. Roy. Soc. Canada, vol. 3, p. 65. Para- 



doxides zone. Taconic. 



ULRICHIA Jones, 1890; Quart. Jour. Geol. Soc. London, vol. 46, p. 543. 



Devonian. Carboniferous. 

 DEPRANELLA Ulrich, 1890; Jour. Gin. Soc, Nat. His., vol. 13, p. 117. 



Cambrian. 



CTENOBOLBINA Ulrich, 1890; Jour. Gin. Soc. Nat. His., vol. 13, p. 108. 



Silurian. Devonian. 

 TETRADELLA Ulrich, 1890; Jour. Gin. Soc. Nat. His., vol. 13, p. 112. 



Cambrian. 

 HIPPA Barr., 1872, Syst. Sil. Boheme, vol. 1, suppl., p. 516. 



PRIMITIA Jones and Holl, 1865; Annals Mag. Nat. Hist., London, 3d 

 series, vol. 16, p. 416. Cambrian. Carboniferous. 



PRIMITOPSIS Jones, 1887; Notes on some Sil. Ostracoda from Gothland, 

 p. 5. Silurian. Devonian. 



SCHMIDTELLA Ulrich, 1892; The Am. Geologist, vol. 10, p. 269. Cambrian. 



APARCHITES. 



APARCHITES Jones, 1889; Annals Mag. Nat. Hist., 6th series, vol. 3, p. 

 385. Cambrian. Silurian. Devonian. 



EURYCHILLINA Ulrich, 1889; Contrib. Micro. Palseont., part 2, p. 52. 



Cambrian. 

 HALLIELLA Ulrich, 1890; Jour. Gin. Soc. Nat. Hist., vol. 13, p. 184, 



Devonian. 



