256 CALIFORNIA ACADEMY OF SCIENCES. 



Homalonotns Koenig, 1825. Icones Foss. Sectiles, p. 7. Type, Homa- 

 lonotus hiighti Koenig. Cambrian. Silurian. Devonian. 



Bavarilla Ban-ande, 1868. Faiiue Sil. des environs de Hof en Bavi^re, 

 p. 7o. Tyi^e, Bavarilla ho/ensin Barr. Tacouic. 



AsArjiiD;E. 

 Asaphus Brongniart, 1822. Crust. Foss., p. 17. Type, Asaphus expamus 



Linne. Cambrian. 



Ptychopyge Angelin, 1854. Palicont. Scaud., p. 51. Type, Pttjchopyfje 



appanata A.ng. Cambrian. 



Brachyaspis Salter, 1866. Mon. Brit. Trilobites, p. 167. Type, Isotelus 



rectifrons Portl. and Asaphus Utvigatus Ang. Cambrian. 



Megalaspis Angelin, 1852. Palrcont. Scand., p. 15. Type, MeijalasplH 



giffos Ang. Cambrian. 



Ogygia Brongniart, 1822. Crust. Foss., p. 26. Type, Asaphus huchi 



Brong. Cambrian. 



Barrandia McCoy, 1849. Annals Nat. Hist., 2d series, vol. 4, p. 409. 



Type, Barrandia cordai McCoy. Cambrian. 



Niobe Angelin, 1852. Palaaont. Scand., p. 13. Type, Asaphus frontalis 



Dalm. Cambrian. 



Asaphellus Callaway, 1877. Quart. Jour. Geol. Soc. London, vol. 33, 



p. 663. Tj'pe, Asaphellus homfrayi Salt. Taconic. 



Nileus Dalman, 1826. Pahead., p. 49. Type, Nileus armadillo Dalm. 



Cambrian. 



STYGINIDiE. 



Styginia Salter, 1853. Rep. 22d Meeting Brit. Assoc. Adv. Sci., p. 59. 

 Type, Asaphus latifrons'Poxi]. Cambrian. 



Illjenid^. 

 lUajnus Dalman, 1826. Palajad., p. 51. Type, Ilkujius crassicauda Wahl. ; 



Nova Acta Reg. Soc. Sci. Upsal., vol. 8, p. 27, pi. 2, figs. 3, 5, 6. 



(Not pi. 7, figs. 5, 6=Illa'nus esmarhi). Cambrian. Silurian. 



Dysplanus Burmeister, 1843. Organization Trilobites, p. 105 (Ray Soc. 



Ed., 1846), Type, Illanus centrottis Dalm. Cambrian. 



Bumastiis Murchison, 1839. Sil. Syst., -p. 656. Type, Bumastus barrien- 



sis Murch. Camln-ian. Silurian. 



Panderia Volborth, 1863. Mem. Acad. St. Petersburg, 7th series, vol. 6, 



No. 2, p. 31. Type, Panderia triquctra Volb. Cambrian. 



.^GLINID.E. 



^glina Barrande, 1852. Syst. Sil. Boh^me, vol. I, p. 663. Type, ^Eglina 

 rediviva Barr. Cambrian. 



Ill^nubid^. 

 lUaenurus Hall, 1863. Sixteenth Rep. New York State Cab. Nat. Hist., 

 p. 176. Type, Illcenurus quadratus Hall. Taconic. 



