OLENELLUS AND OTHER GENERA OF MESONACID.Ti 



2sl 



Genera and Species. 



Nez'adia, new genus 



n'ccksi. new species , 



Elliptoccphala Emmons 



asaphoidcs Emmons 



Mesonacis Walcott 



? mickzcitci ( Schmidt) 



Mesonacis torelli (Moberg) 



vennontaiia (Hall) 



Holmia ]\Iatthew 



kjcniK ( Linnarsson) 



lundgreni (Moberg) 



roivci. new species 



Callavia Matthew 



broggeri (Walcott) 



hiirri, new species 



callavci (Lap worth) 



cartlandi (Raw) (MSS.) 



crosbyi, new species 



ncvadciisis, new species 



Wanncria, new genus 



gracile, new species 



lialU, new species 



wakottanns (Wanner) 



Pcedeumias, new genus 



traiisitans, new species 



Olencllus Hall 



argent lis, new species 



canadensis, new species 



claytoni, new species 



frcmonti, new species 



gigas Peach 



gilberti Meek 



gilberti var. undt . . . .' 



lapivorthi ( Peach) 



logani. new species 



reficulatits Peach 



tlwtupsoni Hall 



thompsoni crassimarginatus, new variety. 



? zvalcotfi (Shaler and Foerste) 



? sp. undt. (Sweden) 



? sp. undt. (Scotland) 



PeachcUa, new genus 



iddingsi (Walcott) 



OlencUoides Peach 



armatus Peach 



Lower Cambrian. 



A» 



X? 

 X? 



T 



D^ 



^ See page 250, opposite, for the explanation of these symbols. 



