GEOLOGY OF SARATOGA SPRINGS AND VICINITY 97 



Lyrodesma schucherti Rued. 

 Solenomya ? insperata Rued. 

 Cuneamya acutifrons Ulrich 



Gastropoda 



Archinacella orbiculata (Hall) 

 Cyclonema montrealense Billings 



C. cushingi Rued. 

 Clathrospira subconica Hall 

 Pterotheca cf. canaliculata (Hall) 



Crustacea 



Eoharpes ottawensis Billings 

 Trinucleus concentricus (Eaton) 

 Proetus undulostriatus (Hall) 

 Calymmene senaria Conrad 

 Lepidocoleus jamesi H. ^ W . 

 Ctenobolbina subrotunda Rued. 

 Technophorus cancellatus Rued. 



Other localities which deserve notice are: 



1 The shore i to 2 miles north of Snake hill, where the shales 

 contain : 



Dicranograptus nicholsoni Hopkinson, abundant 

 Diplograptus amplexicaulis var. pertenuis Rued. 



D. (Mesograptus) putillus Hall 

 Archinacella orbiculata (Hall) 

 Leptobolus sp. 



2 West shore of lake (Edgewater Park, Riley s etc.) : 

 Dicranograptus nicholsoni Hopkinson 

 Glossograptus quadrimucronatus mut. pertenuis Rued. 

 Diplograptus amplexicaulis Hall 



D. amplexicaulis var. pertenuis Rued. 

 D. (Mesograptus) putillus Hall 

 Climacograptus spiniferus Rued. 



3 A thin sandstone band in the shale at the foot of the hills 

 east of Moses kill contains : 



Schizocrinus cf. nodosus Hall (joints) 

 Dalmanella testudinaria (Dalman) 

 Plectambonites sericeus (Sowerhy) 

 Rafinesquina alternata (Emmons) 

 Cyclora cf. minuta Hall 



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