CANANDAIGUA AND NAPLES QUADRANGLES 



61 



inces, an eastern (Naples subprovince) into which only the ad- 

 vance guard penetrated on its invasion from the west, and a west- 

 ern or Chautauqua subprovince. These two subfaunas of the 

 Genesee provinces are knit together by unity of generic and to 

 some extent of specific* characters, but differ more in respect to 

 predominant species. 



We have then in the rocks before us the typical development 

 of the fauna of this Naples subprovince or the Naples fauna in 

 its proper sense. 



The species are: 



Crustaceans 

 Eleutherocaris whitfieldi Clarke 

 Stylonurus? wriglitianus Dawson 

 Spathiocaris emersoni Clarke 

 Dipterocaris 



Ccphalopods 

 Manticoceras pattersoni Hall 

 M. apprimatum Clarke 

 M. tardum Clarke 

 M. accelerans Clarke 

 M. vagans Clarke 

 Probeloceras lutheri Clarke 

 V.l naplesense Clarke 

 Beloceras iynx Clarke 

 Tornoceras uniangulare Conrad 

 T. uniangulare var. obesum Clarke 

 Cyi'toclymenia neapolitana Clarke 

 Bactrites gracilior Clarke 

 B. aciculum Hall 

 Orthoceras pacator Hall 

 O. Ontario Clarke 

 O. filosum Clarke 



Pteropods 

 Hyolithus neapolis Clarke 

 Tentaculites gracilistriatus Hall 

 T. tenuicinctus Roomer 

 Styliolina fissurella Hall 

 Protospirialis minutissima Clarke 



Gastropods 

 Loxonema noe Clarke 

 MacTochilina pygmaea Clarke 

 Palaeotrocbus praecursor Clarke 

 Diaphorostoma rotundatum Clarke 



Pleurotomaria cognata Clarke 

 P. ciliata Clarke 



Protocalyptraea marshalli Clarke 

 Pbragmostoma natator Hall 

 P. incisum Clarke 

 P. cf. triliratum Hall 

 Tropidocyclus byalinus Clarke 

 Bellerophon I^oeneni Clarke 



Lamellihranchs 



Lunulicardium acutirostrum Hall 



L. ornatum Hall 



L. clymeniae Clarke 



L. hemicardioides Clarke 



L. velatum Clarke 



L. finitimum Clarke 



L. sodale Clarke 



L. pilosum Clarke 



L. paruiiculus Clarke 



Pterocliaenia fragilis Hall 



P. fragilis var. orbicularis Clarke 



P. perissa Clarke 



lloneoyea erinacea Clarke 



H. majora Clarke 



Paraptyx Ontario Clarke 



Ontaria suborbicularis Hall 



O. clarkei Bcushaiisen 



O. afliliata Clarke 



O. ha Hi Clarke 



Buchlola retrostriata r. Jiiicli. 



B. scabrosa Hall 



B. conversa Hall 



Paracardium doris Hull 



Palaeoneilo petila Clarke 



P. muricata Clarke 



