182 CALIFORNIA ACADEMY OF SCIENCES. 



Classifies the Trilobites into 4 sections aud 15 genera. 



I — Polyopsites, more than two eyes: 1, Alloctojjs Raf. 1821. 2, Diplop- 

 .svVc.s Eaf. 1821. 3, Tomolvjus B.&i. 1821. 



II — Diopsites, with two eyes: 4, Isociomesa Eaf. 1821 (Isotelus Dekay 

 1824, Nileus Dalm. 1826), subgen. Illamus Dalm. 5, Dipleura Green. 6, 

 Asaphus Brong. 7, Trilohites Park. 1812 (Calymene Brong., Glomerites 

 Raf. 1817). 8, Telesiops Raf. 1832 (Phacops). 9, Promenites Raf. 1882. 

 10, Ogygia Brong. 



Ill — Monopsites, only one eye: 11, Metapteles Green, or Monopsites 

 Green, or Cryptolithus Green ( Trinucleus). 



IV — Anopsites, no eyes: 12, Agnostus Brong. 13, Paradoxldes Brong. 

 14, Ampyx Dalm. 15. RetusHes Raf. 1821. 



Ramsay (A. C.) The Geology of North Wales, with 

 an appendix on the fossils; with plates by J. W. Salter. 



In Mem. Geol. Survey Gt. Brit., vol. 3, 1866. 



Hymenocaris vermicauda Salt. Lingulocaris Ungukecomes n. sp. C'era- 

 iiocarh? latus n. sp., C. msperatus n. sp. Beyrichia compUcata Salt. 



Trilobita: Agnostics princeps n. sp., A. pisi/ormis Linne, A. maccoyi 

 Salt., A. trinodus Salt., A. limhahis Salt., A. sp.? (allied to A. limbatus). 

 Paradoxides hicksil n.s'p. Olenus micrurus Salt., 0. cataractes n. sp., O. 

 scarabceides Wahl., 0. ( Parabolina) serratus n. sp., 0. ( Sphcerophthalmus ) 

 flagellifer Ang. ? 0. sp.? 0. (Sphctrophth.) alatus Boeck, 0. (S})hcerophth.) 

 humilis Phill., 0. impar n. sp. Dikelocephalus ( Centropleura? ) furca n. 

 sp., D. (Centropdeura? ) celticus n. sp., Z).? ( Centropleura? ) discoidalis n. 

 sp., D.! (Centropleura?) sp.? Conocorphype invita Salt., C. abdita n. 

 sp., C. sp.? C. simplex n. sp., C. vexata n. sp., C. (Solenopleura) de- 

 pressa Salt., C. ? verisimiUs n. sp., C? olenoides n. sp. Angelina sedgwickii 

 Salt. Asaphus (Isotelus) affinis McCoy, A. homfrayi n. sp., A. radiatus 

 Salt., A. poioisii lAw^ch., A. ( Basilicus) tyrannusMnrch. Ogygia scutatrix 

 Salt., 0. peltata n. sp., 0. selwynii Salt. Niohe homfrayi n. sp. Psilo- 

 cephalus n. g., P. innatatus n. sp., P. inflatus n. sp. Illcenopsis n. g., /. 

 ihomsoni n. sp. Ilkentis boiomanni Salt., /. davisii Salt. ^glina grandis 

 Salt., ^. sp. ? ^E. binodosa Salt., ^E.? caliginosa n. sp. Trinucleus murch- 

 isoni Salt., T. sedgwicki n. sp., T. gibbsii Salt., T. concentricits Eaton, T. 

 favus n. sp. Ampyx tiimidus'Fovhes, A. prvenuntiusii. sp. Dionide atra 

 n. sp. Cheirurus frederici n. sp., C. juvenis^ali., C. octolobatusMcCoy, C. 

 bimucronatus Mnrch. Bhicrinurus sexcostatus Salt. Cybele verrucosa Dalm. 

 Lichas laxatus McCoy. Calymene parvifrons n. sp., C. bUimenbachii also 

 var. hrevicapitata (or caractaci), C. blumenbachi var. cambrensis, C. dupli- 

 cata Murch. Homalonolus bisulcatus Salt..? H. rudis Salt. 



Rathbun (Richard). See Hartt (C. F.; and Rathbun 

 (Richard). 



