356 



NEW YORK STATE MUSEUM 



We have already had occasion to note the indications of the Intumes- 

 cens fauna in the regions of western North America. These are : 



BRITISH COLUMBIA 



HAY RIVER 



IOWA 



CERRO GORDO CO. 



Manticoceras intumescens with Lime Creek shales with Manticoceras 



Hypothyris cuboides, Schizo- 

 phoria striatula, Pugnax pug- 

 nus, Spir. disjunct us 

 (Horizons not differentiated) 



intumescens, Pugnax p u g n u s, 

 Spir. disjunctus, Stroph. arcu- 

 ata and other species common to the 

 fauna of Highpoint, Naples, which is 

 stratigraphically equivalent to the Port- 

 age sandstones 



RANGE OF SPECIES IN THE CHAUTAUQUA AND NAPLES SUBPROVINCES 

 To bring into comparison the fauna of the Genesee province with the 

 most carefully studied sections in the Rhineland, Westphalia, the Hartz 

 and Timan, we give in the following tables the variation in the composition 

 of the subfaunas in their typical or best developed manifestation, the two 

 subprovinces of New York. 



VERTICAL RANGE OF SPECIES IX THE LAKE ERIE SECTION" (CHAUTAUQUA 



SUBPROVINCE) 



At top Laona sandstone with Spirifer disjunctus and the brachio- 



pod fauna of the Chemung; equivalent to Long Beards riffs sandstone, 



Genesee valley. 



Portland shales and flags 



Stratigraphic equivalent of Wiscoy shales and Portage sandstone in Genesee section, 



of Highpoint sandstone and Prattsburg sandstones (in part) of the Naples section. The 



last named units carry only a Chemung fauna. 



Cephalopods 

 Tornoceras bicostatum 

 Manticoceras rhynchostoma 



Lunulicardium accola 

 L. eriense 

 L. furcatum 

 L. absegmen 

 Posidonia mesacostalis 

 P. venusta nitidula 

 Kochia ungula 

 Loxopteria dispar 

 L. laevis 

 L. vasta 



Pteropods 

 Stvliolina fissurella 



Lamellibra nchs 



L. intumescentis 

 L. corrugata 

 Ontaria concentrica 

 Euthydesma subtextile 

 Elasmatium gowandense 

 Praecardium vetustum 

 Conocardium gowanense 

 Palaeoneilo constricta 

 P. brevicula 



Gastropods 

 Phragmostoma chautauquae 

 Palaeotrochus praecursor 



