254 CALIFORNIA ACADEMY OF SCIENCES. 



OLENELLIDJE. 



Olenellus Hall, 1861. Fifteenth Kep. New York State Cab. Nat. Hist., p. 

 1 14. Type, Olenellus tkompsoni Hall. Twelfth Kep. New York State 

 Cab. Nat. Hist., p. 59, figure. Taconic. 



PARADOXID^. 

 Paradoxides Brongniart, 1822. Hist. Crust. Foss., p. 30. Type, Para- 



doxides tessini Brong. Taconic. 



Anopolenus Salter, 1864. Geol. Soc. London Jour., vol. 20, p. 236. Type, 



Anopolenus henrici Salt. Taconic. 



Bathynotus Hall, 1860. Thirteenth Rep. New York State Cab. Nat. Hist., 



p. 117. Type, Bathynotus holopuga Hall. Taconic. 



Dicellocephalus Owen, 1852. Kep. Geol. Survey Wisconsin, Iowa and 



Minnesota, p. 573. Type, Dikelocephalus minnesotensis Owen. 



Taconic. 

 Dolichometopus Angeliu, 1854. Palaeont. Scand., p. 72. Type, Dolicho- 



metopus svecicus Aug. Palaeoiit. Scand., p. 73, pi. 37, fig. 9. Taconic. 

 Hydrocephalus Barrande, 1846. Notice Prelim. Syst. Sil. Boheme, p. 18. 



Type, Hydrocephalus carens Barr. . Taconic. 



REMOPLEURID.E . 



Kemopleurides Portlock, 1843. Geol. Rep. Londonderry, etc., p. 254. 

 Type, Remopleurides colbii Portl. 



OLEXID^E. 

 Protolenus Matthew, 1892. Bull. Nat. Hist. Soc. N. B., No. 10, p. 2. 



Type, P. eleyans Matt. Tacouic. 



Oleuus Dalman, 1826. Palaead., p. 56. Type, Olenus yibbosus Wahl. 



Taconic. 

 Zecanthoides Walcott, 1887. Am. Jour. Sci., 3d series, vol. 36, p. 165. 



Type, Olenoides spinosus Wai. Taconic. 



Paraboliua Salter, 1849. Mem. Geol. Survey United Kingdom, decade 2. 



Type, Olenus spinulosa Wahl. Taconic. 



Peltura Milne-Edwards, 1840. Hist. Nat. Crust., vol. 3, p. 344. Type, 



Olenus scarabceoides Wahl. Taconic. 



Cyclognathus Linnarsson, 1875. Geol. Foreniiigeiis Stockholm Forhandl., 



vol. 2, No. 12, p. 500. Type, Cyclognathus micropygus Linrs. 



Taconic. 

 Triarthrus Green, 1832. Moil. Trilobites North America, p. 87. Type, 



Triarthrus beckii Green. Cambrian. 



Leptoplastus Angeliii, 1854. Palaeont. Scand., p. 46. Type, Leptoplaxtus 



stenotus Aug. Taconic. 



1. Sphrerophthalmus Angeliu, 1854. Palasont. Scand., p. 49. Type, 



Sp hcerojyhthalmus flagellifer Ang. Taconic. 



2. Cteiiopyge Linnarsson, 1880. Geol. Foreniiigeiis Stockholm 



Forhandl., vol. 5, p. 145. Type, Olenus (Sphwrophthalmus) 

 pec ten Salt. Taconic. 



