CANANDAIGUA AND NAPLES QUADRANGLES 



49 



Pteropods 



Styliolina fissurella Hall c 



Hyolithus aclis Hall .^ r 



Gastropods 



Bellerophon leda Hall. c 



B. lyra Hall r 



B. acutilira Hall r 



Cyrtolites mitella Hall r 



riatyceras symmetricum Hall. . . c 

 P. erectum Hall 



P. conicum Hall 

 P. attenuatum Hall 

 P. thetis Hall 



P. bucculentum Hall c 



P. carinatum Hall c 



P. echinatum Hall 



Pleurotomaria capillaria Conrad, c 



P. itys Hall c 



P. trilix Hall 



Loxonema delphicola Hall 

 Diaphorostoma lineatum Conrad, cc 

 Cyclonema hamiltoniae Hall 



C. multilira Hall 

 Euomphalus rudis Hall 



Murchisonia turricula Hall r 



Macrocheilus hebe Hall 



Lamellibranchs 

 Mytilarca oviform is Conrad 

 Macrodon hamiltoniae Hall 

 Microdon bellistriatus Conrad 

 Buchiola halli Clarke 

 Cypricardinia indenta Conrad 

 C. pygmaea Hall 

 Grammysia arcuata Hall 

 Goniophora acuta Hall 

 Modiomorpha complanata Hall 

 M, concentrica Conrad 

 M. macilenta Hall 

 Nuculites oblongatus Conrad 

 Aviculopecten princeps Conrad 

 Palaeoneilo constricta Conrad 

 P. emarginata Conrad 

 P. fecunda Hall 

 P. plana Hall 

 P. tenuistriata Hall 



Brachiopods 

 Craniella hamiltoniae Hall 



Rhipidomella penelope Hall c 



R. vanuxemi Hall cc 



Orthothetes pandora Billings 

 Stropheodonta concava Hall 



S. inequistriata Conrad cc 



S. junia Hall c 



Pholidostrophia nacrea Hall , 

 Leptostrophia perplana Conrad , . cc 



Chonetes coronatus Conrad c 



C. lepidus Hall 

 C. deflectus Hall 

 C. scitulus Hall 

 Productella navicella Hall 

 P. tullia Hall 

 Spirifer angustus Hall 



S. fimbriatus Conrad c 



fe. granulosus Conrad c 



S. audaculus Conrad 

 S. marcyi Hall 



S. mucronatus Conrad c 



S. consobrinus d'Orl)igny 

 Ambocoelia umbonata Conrad . . . cc 

 A. praeumbona Hall 

 Cyrtina hamiltonensis Hall 



Nucleospira concinna Hall cc 



Trematospira hirsuta Hall c 



T. nobilis Hall 

 Trigeria lepida Hall 

 Meristella haskinsi Hall 



Athyris spirif oroides Eaton c 



Camarotoechia congregata Con- 

 rad 



C. sappho Hall 



Liorhynchus multicosta Hall .... r 



L. quadricostatus Vanuxem r 



Pentamerella pavilionensis Hall. . c 

 Cryptonella rectirostris Hail 

 Terebratula lincklaeni Hall 

 Tropidoleptus carinatus Conrad. . cc 



Crinoids 



Nucleocrinus lucina Hall 

 Dolatocrinus glyptus Hall 



D. liratus Hall 



On comparing these lists of species we find that while they are 

 essentially homogeneous there are certain characteristic 

 differences. 



