FOSSILS OF THE CARBONIFEROUS LIMESTONES. 



297 



list, belongs likewise to the species under description; but P. spinosa, 

 Sow., specimens of which I have not seen from Nova Scotia, is a 

 distinct species. Sir C. Lyell mentions Windsor, Brookfield, Shubena- 

 cadie, East River, De Bert River, and Minudie. Dr Dawson states 

 that the shell is found almost everywhere — at Pugwash, near Amherst, 

 Boulardarie, Cape Breton, Horton Bluff, Gay's River, etc. 



Fig. 97. — Prodv£tus semireticulatus. — Martin. 



(a) Ventral valve. [b] Small specimen showing dorsal valve. 



" The largest specimen measured one inch and a half in length by 

 about the same in width. The variety Martini is also found in the 

 same locality. 



Fig. 98. — Productus cora. — D'Orbigny. 

 6 



(a) Dorsal, and {b) ventral valve. 



''Productus cora, D'Orbigny, 1842 (Fig. 98). 



'' Productus cora, D'Orbigny, 'Palaeont. du Voyage dansl'Amerique 

 Merid.,' p. 55, pi. 5, figs. 8, 9, 10, 1842. 



"P. comoides and P. Scoticus, De Kon. 1843 (not of Sow.) 



" Producta corrugata, M'Coy, ' Synopsis of the Carb. Limest. Fossils 

 of Ireland,' pi. 26, fig. 13, 1844. 



"P. Lyelli, De Verneuil, Sir Charles LycU's 'Travels in North 

 America,' vol. ii. p. 221, 1845. 



"P. tcnuistriata and P. Ncffedicvi, Do Vcrn., 'Russia and the Ural 

 Mountains,' 1845. 



u 



