182 CALIFORNIA ACADEMY OF SCIENCES. 



Classifies the Trilobites into 4 sections and 15 genera. 



I — Polyopsites, more than two eyes: 1, Alloctops Eaf. 1821. 2, Diplop- 

 .s/Ces Eaf. 1821. 3, Tomoligus ^ai. 1821. 



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

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

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

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

 10, Oyygia Brong. 



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

 Green, or CryptoUthus Green ( Trinucleus). 



IV — Anopsites, no eyes: 12, Agnostui^ Brong. 13, Paradoxides Brong. 

 14, Ampyx Dalm. 15. Betusites Eaf. 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. Lingidocaris lingulacomes u. sp. C'era- 

 tiocaris? latus n. sp., C. insperatus n. sp. Beyrichia complicata Salt. 



Trilobita: Agnosius princeps n. sp., A. pisiformis Linne, A. maccoyi 

 Salt., A. trinodufi Salt., A. limhatus Salt., A. sp.? (allied to A. limbatus). 

 Paradoxides hicksii n.sp. Olenus micrurus Salt., 0. cataractes n. sp., 0. 

 Hcarabceides Wahl., O . ( Parabolina) serralus n. sp., 0. ( Spharophthalmus ) 

 Jlagellif er Ang.l 0. sp.? O. (Sphcerophth.) alatus Boeck, 0. (Sphcerophth.) 

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

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

 sp., DJ (Centropleura?) sp.? Conocorphype invita Salt., C.ahdita n. 

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

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

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

 Salt., A. poioisii'MMTch.., A. ( Basilicus) tyrannus Murch. Ogygia scutatrix 

 Salt., 0. peliata n. sp., 0. selwynii Salt. Niobe homfrayi n. sp. Psilo- 

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

 thomsoni n. sp. Illmnus bowmanni Salt., /. davisii Salt. jEglina grandis 

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

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

 favus n. sp. Ampyx tumidus Fovhes, A. prainuntiusii. sp. Dionide atra 

 n. sp. Cheirurus frederici n. sp., C jM?;eri«.sSalt., C. octolobatus McCoj, C. 

 bimucronatus Murch. Encrinurus sexcostatus Salt. Cybele verrucosa Dalm. 

 Lichas laxatus McCo J. Calymene par vifrons n. sp., C. blumenbachii a,\so 

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

 caia Murch. Homalonotxis bisulcatus ^aMJ H . rudis S&lt . 



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

 (Richard). 



