niBLIOGllArMlV OK I'AL.EOZOIC CIMSTACEA. 281 



Stratigraphic position of the Oleiiellus fauna 



in Nortli America and Europe. 



Am. Jour. Sci., .3d series, vol. 37, 1889, p. 374, coiitinneil on p. .392 of 

 the same jouriml. 



Descriptive notes on new genera and species, 



from the Lower Cambrian or Olenellus zone of North 

 America. 



lu Proc. U. S. Natl. Mas., vol. 12, 1889, p. 34. 



Aynostus desideratuH n. sp., A. sp.? Microdhcus hcle)ia u. sp. Olenellus 

 ( Misonacis) asaphoides Emmons, 0. ( M. ) bror/geri Walcott. Avalonkt u. 

 g., .4. mannelensis u. sp. Zacanlhoides eatoni n. sp. Solenoplexra harvfi/i 

 11. sp., .'^. hoivleyi n. sp. 



The fauna of the Lower Cambrian or Olenellus 



Zone. 



lu lOth Rep. U. S. Geol. Sur. Washington, 1890, pp. 5ir»-658, pis. 43-98. 



Isoxys n. g., /. chilhoweanan. sp. L€j)€rditia dematoide-i \Ya\. Arisiozoe 

 roiitndaia Wal., A. troyensis Ford. Nortozoel vermontana Whitf. Proto- 

 caris marshi Wal. A<jnosttis de.sideratUH Wal., A. nobiliH Ford., A.fi\}.'i 

 Mk roadie us hellimarginatus S. <& F., ^/*'. connexus Wal., M. meeli Ford., 

 M. par keri Vial., M. lobcdus Kail, M. sjicciosus Fovd., M. helena Wal., M. 

 sp. ? Olenellus thompsoni Hall, O. gilberti Meek, O. Iddings Wal. 



Mesonacis: Olenellus (Mesonacis) vermontnna Hall, O. ( M.) mkl-n-'ii-.ia 

 Schm. and 0. (M.) ctsaphoides Emmons. 



Holmia: Olenellus (Holmki) kjerulfi Linrs., 0. (H.) brljggeri Wal., <>. 

 (H.J callavei Lapw. Olenokles fordi Wal., 0. marcoui Whitf., 0. ellsi. u.sp., 

 O. ( Doryjtygc ) disklerata n. sp., O. quadriceps H. & W. Zacanthoides leevis 

 Wal., Z.ea<o«/ Wal. Bathynotusholopyge Hall. Avalonia manuelen.His Wal. 

 Conocoryphe Irilineata Emmons, C. reticulata n. sp. Ptychoparia adamxi 

 Bill., P.t attleborensis S. & F., P.ftchi Wal., P. miser Bill., P. metisensin 

 u. sp., P. subcoronataH. & W., P. ^eKc^^r Bill., P. vulcanus Bill. (Jrejii- 

 cephalus angusta Wal., C.lilliana Wal. Oryctocephalus primus Wal. Agran- 

 los strenuus Bill., also var. na-iutus, A. redpathi u. sp. Protypus hitchcocki 

 Whitf., P. seneclus Bill., P. clavatus Wal. Solenopleura bombi/rons Matt., 

 S. harveyi Wal., .S'..? howleyi Wal., .9.? nana Ford., S.? iumida Wal. 



In this contribution to the Oleiiellus zone Walcott gives a bibliographic 

 reference to the articles on the subject, also a historical review, with 

 geologic description of the Lower Cambrian or Olenellus zone as known 

 to the geologist, etc. 



Notes on the Cambrian rocks of Vit-oinia and 



the Southern Appalachians. 



In .\m. Jour. Sci., 3d series, vol. 44, 1692, p. .VJ. 



