258 CALIFORNIA ACADEMY OF SCIENCES. 



AciDASPIDa:. 



AcidasiDis Murcliisoii, 1839 (OdontopleAira Emmrich, 1839). Silurian Sys- 

 tem, p. 558. Type, Acidaspis hrightii Mvu-ch. 



Cumbrian. Silurian. Devonian. 



LlCHASID^E. 



Liclias Dalman, 1826. Palaead., p. 53. Tj'pe, Lichas laciniatus Wahl. 



Cambrian. Silurian. 

 Terataspis Hall, 1863. 16th Kep. New York State Cab. Nat. Hist., p. 223. 



Tj'pe, Lkhas ( Teratasph) grandis Hall. Devonian. 



Proetids;. 

 Proetus Steininger, 1831. Mem. Soc. Geol. France, vol. 1, p. 355. Type, 



Proetus cuvierl Stein. 



Cambrian. Silurian. Devonian. Carboniferous. 

 Decheuella Kayser, 1880. Zeitscbr. Deutsch. Geol. Gesell., Berlin, vol.32, 



p. 703. Type, yEonia verticalis Burm. Devonian. 



Prionopeltis Corda, 1847 (Phaeton Barr., Phaethonides Angelin). Prodr., 



p. 121. Type, P^vonopeUes polydoriis Cord. Devonian. 



Xiphogomium Corda, 1847. Prodr., p. 70. Type (X. deherlaniim Cord.) 



Proetus loveni Barr. Silurian. 



Celmris Angelin, 1852. Palaout. Scand., p. 23. Type, C. granulattts 



Ang. Cambrian. 



Brachymetopus McCoy, 1847. Annals Mag. Nat. Hist.. 1st series, London, 



vol. 20, p. 229. Type, Phillqma maccoyi Portl. Carboniferous. 



Cyphaspis Burmeister, 1843. Org. Trilobiten (Ray Soc. Ed., p. 98). 



Phacops ceratophthalma Goldf. Cambrian. Silurian. Devonian. 

 Arethusina Barrande, 1852. Syst. Sil. Boheme, vol. 1, p. 494. Arethusina 



l-onincki Barr. Cambrian. Silurian. Devonian. 



Harpides Beyrich, 1846. Untersuch. Trilobiten, p. 34. Type, Harjndes 



hospes Beyr. Taconic. Cambrian. 



Carmon Barrande, 1872. Syst. Sil. Boheme, vol. 1, suppl., p. 19. Type, 



Cannon midtllus Barr. Cambrian. 



Cyphoniscus Salter, 1852. Eep. 22d Meeting Brit. Assoc. Adv. Sci., 



Trans. Sec, p. 95. Type, Cyphoniscus socialis Salt. Cambrian. 



Phillipsid.5;. 

 Phillipsinella Novak, 1885. Sitzungsber. k. bohn. Gesell. Wiss., 1885. 



Author's edition, p. 4. Type, Phillipsia parabola Barr. 



Cambrian. 

 Phillipsia Portlock, 1843. Geol. Rep. Londonderry, etc., i>. 305. Type, 



PhilUpsia kelli Portl. = Asaphus gemmulifera Phill. 



Carboniferous. Permian. 

 Ciriffithides Portlock, 1843. Geol. Eep. Londonderry, etc., p. 310. Type, 



Grijfithides longiccps Portl. Carboniferous. 



Harpesid^. 

 Harpes Goldfuss, 1839. Nova Acta Physico-Med., vol. 19, p. 358. Type, 



Harpes imgula Sternb. Cambrian. Silurian. Devonian. 



