NAPLES FAUNA IN WESTERN NEW YORK, PART 2 31 I 



PAX AEONEILO H al 1 . I 8 JO 



Palaeoneilo constricta Conrad 



Plate 15, fig. 9-13 



Nuculites constricta Conrad, Acad. Nat. Sci. Phila. Jour. 1842. 8:249, 



pi. 15, fig. 8 

 Nucula bellula Hall, Geology of New York ; rep't on fourth dist. 1843. P- 97> 



tab. 78, fig. 7 

 Palaeoneilo constricta Hall, Paleontology of New York. 1885. v. 5, pt 1, 



2 , P. 333, Pi- 48, fig- 1-16 ; pi. 51, fig. 17 



This species, common in the Hamilton fauna of western New York, 

 was identified and figured by Professor Hall from the Portage beds of 

 Portland Harbor (Barcelona) on the Lake Erie shore, Chautauqua co. 

 We find the species to be quite abundant at certain localities in the soft 

 shales of that region though rare farther east and not yet recognized as far 

 eastward as the Genesee river. All the characters presented by the Ham- 

 ilton shell are well expressed in these later representatives. The species is 

 also common in the Ithaca fauna of central New York, but is not known in 

 the geographic interval at this horizon between Cayuga lake and Chau- 

 tauqua county. In the localities of the latter region the shell is associated 

 with Praecardium vetustum, Lunulicardium of various species and 

 the general fauna of the province. 



Habitat. Genesee province ; Chautauqua subprovince. Portland Har- 

 bor (Hall), Correll's point near Brocton, and Forestville, Chautauqua co. 



Palaeoneilo petila sp. nov. 



Plate 15, fig. 1-8 



This little shell in some features is similar to P. constricta, having- a 

 sinuous posterior extremity and the arrangement of the ligament pits as in 

 that species. It is however always small, transversely ovate, never so broad 

 as in P. constricta; beak behind the anterior third of the length, ante- 

 rior margin subelliptic, basal margin convex, broadly curved, often with an 

 interruption to this curvature caused by the projection of the low umbonal 

 ridge ; narrowing behind to a subattenuate posterior extremity and emar- 



