759 



Prod. 



formis, McChesney, in the western U. S., P. lyelli, Dawson, in 

 the Nova Scotia Lower carhoniferous limestones, (Davidson 

 in Dawson's Acad. Geol.) This shell is found in South Amer- 

 ica and in India. — XI f 



P. Gora var. pileatus, McOhesney, recognized by J. J. 

 Stevenson in the Coal measures of S. W. Pennsylvania, K8,p. 

 3111.— X///. 



Productus costatus. Sowerby's English species, which in 



m\A 



America ranges through the coal measures from bottom to top 

 in the western States and Kocky mountains. Similar to, but 

 smaller and more coarsely ribbed than Productus semireticu- 

 latus. XIIL Collett's Indiana Report of 1883, page 124, plate 

 24, figs. 4, 5, 6, natural and common size ; plate 25, figs. 3, 4, 

 6, natural size of a large specimen. In Pennsylvania, in the 

 Crinoidal L. Barren measures, of Fayette Co. (L, p. 35) ; and 

 Ferriferous Z. Beaver Co. (Q, p. 'l^^.)—XIII, XIV, 



Productus depressus. See Strophomena depressa. V i. 



Proauctus elegans^ Norward and Pratten, name preoccupied. 

 See P. cestriensis. XL 



Productus flemingi, Sowerby. Min. Couch. Vol. 1,1814, 

 Lower carhoniferous. — Var. burlingtonensis. Hall, Iowa re- 

 21 



