CANANDAIGUA AND NAPLES QUADRANGLES 



61 



inces, au 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 

 Eleutberocaris whitfieldi Clarke 

 Stylonurus? wriglitianus Dawson 

 Spatliiocaris einersoni Clarke 

 Dipterocaris 



Cephalopods 

 Mauticoceras pattersoni Hall 

 M. appriinatuin Clarke 

 M. tardiim Clarke 

 M. accelerans Clarke 

 M. vagans Clarke 

 Probeloeeras lutberi Clarke 

 P.? naplesense Clarke 

 Beloceras iynx Clarke 

 Toruoceras uniangulare Conrad 

 T. uniangulare var. obesuin Clarke 

 Cyrtoclymenia neapolitana Clarke 

 Bactrites gracilior Clarke 

 B. aciculum Hall 

 Ortlioceras pacator Hall 

 O. Ontario Clarke 

 O. filosum Clarke 



Pteropods 

 Hyolitlius neapolis Clarke 

 Tentaculites gracilistriatus Hall 

 T. tenuicinctus Roemer 

 Styliolina fissurella Hall 

 Protospirialis niinutissinia Clarke 



Gastropods 

 Loxoneuia noe Clarke 

 Macrochilina pyginaea Clarke 

 Palaeotrocbus praecursor Clarke 

 Diapborostoina rotunda tum Clarke 



Pleurotomaria cognata Clarke 

 P. ciliata Clarke 



Protocalyptraea marshalli Clarke 

 Pbragmostonia natator Hall 

 P. incisum Clarke 

 P. cf. triliratum Hall 

 Tropidocyclus byalinus Clarke 

 Belleropbon koeneni Clarke 



Lamellibranehs 



Lunulicardium acutirostriun Hall 



L. ornatum Hall 



L. elymeniae Clarke 



L. beniicardioides Clarke 



L. velatum Clarke 



L. finitiinuin Clarke 



L. sodale Clarke 



L. pilosum Clarke 



L. parunculus Clarke 



Pterocbaenia fragilis Hall 



P. fragilis bar. orbicularis Clarke 



P. perissa Clarke 



lloneoyea erinacea Clarke 



H. niajora Clarke 



Paraptyx Ontario Clarke 



Ontaria suborbicularis Hall 



O. clarkei Beushausen 



O. affiliata Clarke 



O. balli Clarke 



Bucbiola retrostriata v. Buch 



B. scabrosa Hall 



B. con versa Hall 



Paracardiuin doris Hall 



Palaeoneilo petila Clarke 



P. muricata Clarke 



