182 CALIFORNIA ACADEMY OF SCIENCES. 



Classifies the Trilobites into 4 sections and 15 genera. 



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

 sitesHai. 1821. 3, Tomoligus Raf. 1821. 



llDiopsites, with two eyes: 4, Isoctomesa Raf. 1821 (Isotelus Dekay 

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

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

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

 10, Ogygia Brong. 



Ill Jfowopsz'ites, only one eye: 11, Metapteles Green, or Monopsites 

 Green, or Cryptolithus Green ( Trinucleus). 



IVAnopsites, no eyes: 12, Agnostus Brong. 13, Paradoxides Brong. 

 14, Ampyx Dalm. 15. Retusites 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. Lingnlocaris lingulcecomes n. sp. Cera- 

 tiocaris? latus n. sp., C, msj)eratus n. sp. Beyrichia complicates Salt. 



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

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

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

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

 flagellifer Ang.? 0. sp.? 0. (Sphcerophth.) alatus Boeck, O. (Sphcerophth.) 

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

 sp., D. (Centropleura?) celticus n. sp., D.I (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. ? verisimilis n. sp., C.? olenoides n. sp. Angelina sedgwickii 

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

 Salt., A. powisii Murch., A. (Basilicus) tyrannus Murch. Ogygia scutatrix 

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

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

 thomsoni n. sp. Illaenus bowmanni Salt., /. davisii Salt. JEglina grandis 

 Salt., ^J. sp. ? ^. binodosa Salt., J57. .? caliginosa n. sp. Trinucleus murch- 

 isoni Salt., I 7 , sedgwicki n. sp., I 7 , gibbsii Salt., 7 7 . concentricus Eaton, T. 

 favus n. sp. Ampyx tumidus Forbes, A. prcenuntiusn. sp. Dionide atra 

 n. sp. Cheirurus frederici n. sp., (7. jwy em's Salt., (7. octolobatus McCoy, (7. 

 bimucronatus Murch. Encrinurus sexcostatus Salt. Cybele verrucosa Dalm. 

 Lichas laxatus McCoy. Calymene parvifrons n. sp., (7. blumenbachii also 

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

 cata Murch. Homalonotus bisulcatus Salt./ //. rwcfo's Salt. 



Rathbun (Richard). See Hartt (C. FJ and Rathbun 

 (Richard). 



