230 CALIFORNIA ACADEMY OF SCIENCES. 



Palaeozoic notes: New genus of Cambrian 



Trilobites, Mesonacis. 



In Am. Jour. Sci., 3d series, vol. 29, 1885, p. 328, tigs. 



Describes a new genus, Mesonacis, and substitutes the generic name 

 Bailiella of Matthew for the subgenus Salteria, proposed by him (Bull. U. 

 S. Geol. Survey, No. 10, 1884). 



Mesonacis vermonlana Hall, also probably Olenellus howelli. 



Second contribution to the studies on the 



Cambrian fauna of North America. 



In Bull. U. S. Geol. Survey, No. 30, 1886. 



Oryctocephalus 11. g. Protypus n. g. Leperditia troyensis Ford, L. '! 

 argenta n. sp. Protocaris marshi Wai. Agnostus interstricus White, A . 

 nobilis Ford. Microdiscus speciosus Ford, M. meeki Ford, M. lobatus Hall., 

 M. parkeri n. sp. Mesonacis vermontana Hall. Olenellus thompsoni Hall, 

 0. asaphoides Emmons, 0. iddingsi Wai., 0. gllberti Meek. Olenoides neva- 

 densisM.eek, 0. typicalis n. sp., 0. spinosus \VaL, 0.? flagricaudus White, 

 O.? marcoui Whitf., O. Icevisu. sp., O. quadriceps H. & W., 0. wahsatchen- 

 sis H. & W. Bathynotus holopyga Hall. Ptychoparia kingi Meek, P. 

 adamsi Bill., P. teucer Bill., P. vulcanus Bill., P. miser Bill., P. quadrans 

 H. & W., P. housensis 11. sp., P. piochensis 11. sp., P.? prospectensls Wai., 

 P. trillneata Emmons, P. subcoranata H. & W. Crepicephalus liliana n. 

 sp., C, angusta n. sp. Anomocare? parvum Wai. Oryctocejyhalus primus 

 11. sp. Protypus hichcocki Whit., P. senectm Bill. Solenopleura nana 

 Ford. Bathyuriscus howelli 11. sp., B. productus H. & W. Asaphiscus 

 wheeleri Meek. Dopypyye. 



Fauna of the upper Taconic of Emmons, in 

 Washington County, New York, with one plate. 



In Am. Jour. Sci., 3d series, vol. 34, 1887, p. 187. 



Leperditia dematoides n. sp. Aristozoe troyensls Ford, A. rotundata 11. 

 sp. Microdiscus connexus n. sp. Olenoides for di 11. sp. Solenopleura^. 

 tumida n. sp., #.? nana Ford. Conocoryphe trillneata Emmons. Pty- 

 choparia fitchi n. sp., P, ? (subgenus?) clavata n. sp. 



Cambrian fossils from Mount Stephens, North 



West Territory of Canada. 



Am. Jour. Sci., 3d series, vol. 36, 1888, p. 161. 



The author classes the following species under Olenoides: 0. nevadensis, 

 O. marcoui, 0. quadriceps, 0. wasatchensts. 



Under the genus Zacanthoides he arranges Olenoides typicalis, 0. spino- 

 sus, C. ICKVIS and 0, flagricaudatus. 



