74 CALIFORNIA ACADEMY OF SCIENCES. 



19. Ilheuus cras-sicauda Dalm., /. jierocidls Miirch., /. coifroius Dalm., 

 /. asellusBoeck, I, trincanihus Gold, is referred to Phacops macroccphalus. 



20. Isotelus gigas, I. megaloj^s Greeu, /. siegops Green, /. cyclops Green, 

 /. planus Green, /. plaiycephcdus Stokes. 



21. Cryptonymns expansms'DaXva., ('. extenuatux, C limhatus 'Boeck. C 

 siriatus Boeck, C. acuminatun Boeck, ('. platynotus Dalm., C. schroet'r 

 Schlot. 



22. Ogygia gucUardi Brong., 0. desmarestii Broug., O. huchii Brong., 

 (). corndensis Miirch., 0. tyrannus Murcb., O. suhtyrannus D'Arch. & Verii., 

 O. dilaiata 'Brihin., O. angustifrons Dalm., 0. frontalis Dalm., 0. grandix 

 Sars., 0. pusilla Mtinst., 0. grandava Gold., O. siUimani Broug. (De la 

 Beche Man Geol.) 



23. Odontopleura ovata Emm., 0. dentata Gold. tab. 4, fig. 2, . hrightii 

 Murch. 



24. Conocephalus sulzeri Sclilotb, C. siriatits Emm., C. zippei Sterub. 



25. Gerastos Icevigatus Gold, table 4, fig. 3, a-b. Proefus citvieri Stein., 

 <T. granulosus Gold. tab. 4, figs. 4, a-b, (/. cornuius Gold, tab. 4, figs. 1, G. 

 roncinnus Dalm., G. glohlceps Phill., (1. schusteri'Roem.., G. spluerkns Esm., 

 (t. (Asaphus) hrongniarti Fischer. 



26. Calymene beUatula T)a\iQ..,C, polytoma Dalm.,C'. blumemhachii'Bvong. 

 also -var. tuberculosa Dalm. and var. pulchella Dalm, 0. tristani Brong., C 

 calUcephala Green, C. selenocephala, 0. platys Green, C. diops Green, ('. 

 punctata Dalm., C. propinqua Mtinst., C. articulata Mtinst., C. ornata 

 Dalm . 



27. Homalonotus delphluocephalus Murch. ,_ff. ludensis Mnrch., //. knlghtii 

 Murch., H. herschelii Murch., H. greeniiGold., H. gigas Koem., H. ah- 

 rendii Eoem., H. punctatus Eoem. 



28. Asaphus clavifrons Dalm., A. mucronatus Brong., A . semilunaris 

 Esra., A. plicatus'B. & S., A. longicaudatus Murch., ^4. cnudatus Brong., 

 A. tuberculato-caudatus Murch., A. hausmanni, A. speciosus Dalm., A. 

 heros Dalm., ^4. stokesii Murch., A. dalmani Gold., A. arachnoides tab. 5, 

 fig. 3, A. brongniar tii Delong., A. proofvtis 'Emm., A. ijuadrilimbus Phill., 

 A. obsoletus 'PhiW.., A. truncatulus Phill., A. micrurus Green, A. Umulurus 

 Green, A. loetherilUi Gveen, A. jAeuroptyx Green, A. laticostat us Green, 

 A. selenurus Green, A. subcaudatus Murch., .4. caivdori Murch., A. semi- 

 niferus Phill., A. gemmuliferus Phill,, A. dupdicatus 'Mxirch., A. raniceps 

 Phill., .4. astragalotes Greeu, .4. crypturus Green, .4. brevis Mtinst., A. 

 eichwaldi Fisch. 



29. Acaste downingin- Murch., .4. rotundifrons Emm., A .coiiophthalnius 

 Boeck., A. extensus Boeck, A. sclerops Dalm., A. tetragonocephalus Green, 

 .4. jordani Eoem., .4. microps Green. 



30. Phacops macro2>hthalmus Hvong., P. protuberans Dahn., P. auchiop.'< 

 Green, P. variolaris Brong., P. ceratophthalmus Gold. tab. o, fig. 2, a-b, 

 P. intermedius Mtinst., P . subvariolaris Mtinst., P. grauulntus Mitnst., P. 

 ktvis Mtinst., P. globiceps Phill., P. elegans Boeck., P. scaber Boeck., P. 

 eUiptifrons Esm. 



The author also gives a list of unclassified Trilobites. 



