149 PALAEONTOLOGY OF NEW- YORK. 



This species occurs in the lower beds of the Chemung group near Trumans- 

 burgh, and at the Inclined Plane near Ithaca ; at Paiuted-post and along the line 

 of the Blossburgh railroad to Pennsylvania ; at Grass-valley and Connewango in 

 Cattaraugus county ; at several localities in Chautaqua county, New-York, and 

 at Meadville, Pennsylvania. 



Clionetes lepida. 



PLA.TE XXII. 



[ChoTietes lepida, p. 132 of this volume.] 

 r 



This species occurs in the Chemung group, mostly in the condition of 

 casts ; and is distinguished from the casts of C. scitula by its smaller size 

 and mesial depression. 



In one or two localities it has been found with the shell preserved, 

 and will probably be found in this condition in many places in the 

 freshly quarried stone, beyond the influence of the weather. 



The principal localities where it has been observed in this group are 

 Great-valley and Connewango in Cattaraugus county, and Forestville in 

 Chautauqua county. Rarely it has been observed in the specimens from 

 Meadville, Pennsylvania. 



Choiietes setij»:era. 



PLA.TE XXILj 

 [Chonetes setigera, p. 129 of this volume.] 



This species, which occurs in the Marcellus and Genesee slates, has 

 not been found among the collections from the Chemung group in New- 

 York ; but it occurs associated with C. scitula, and other fossils of the 

 Chemung group, at Meadville, Pennsylvania. 



The specimens consist of casts of the ventral valve and impressions of 

 the exterior of both valves. When the cardinal spines are present, the 

 species is readily identified ; but it may be distinguished from C. scitula 

 by its greater proportional length, and by the rounded coarser striae, and 

 usually greater convexity of the ventral valve towards the apex. 



