FOSSILS OF THE CARBONIFEROUS LIMESTONES. 



297 



list, belongs likewise to the species under description; but /'. tpinosa, 

 . ., specimens of which 1 have not seen from Nova Scotia, is a 

 distinct species. Sir C. Lyell mentions Windsor, Brookfield, Shnbena* 

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

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

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



Fig. 97. — Productus scmircticulatus. — Martin. 



(o) 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. 



(a) Dorsal, and (&) ventral valve. 



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



"Productus cora, D'Orbigny, 'Palaeont. du Voyage dans l'Amerique 

 Mr. id.,' 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 Lyell's 'Travels in North 

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



•• /'. tenuutriata and P. Neffedievi, De Vern., 'Russia and the Ural 

 Mountains,' 1845. 



