FOSSILS OF THE CARBONIFEROUS LIMESTONES. 



291 



exactly similar (except in diinenslons) to those found in other parts 

 of America and Europe. The spiral processes are often preserved. 



Fig. 88 (a, b). — Aihyris subtilita, Hall ; (c) interior, showing spires. 



h 



" This shell occurs by millions in the Lower Carboniferous limestone 

 of Shubenacadie, Urookfield, etc. 



" Spiriferce. — The four so termed species referred to in the lists given 

 by Sir C. Lyell and Dr Dawson appear to belong to two, or at most 

 three (?) species. 



'■'■ Spirifera glalra, Martin, sp. (Fig. 89). 



" ConchylioUtJms Anomites ylaber, Martin, Petrif. Derb., pi. 48 (figs. 

 9, 10), 1809. 



" Spirifer glaber, De Verneuil,. in Sir C. Lyell's ' Travels in North 

 America,' vol. ii., p. 221, 1845, and in Dawson's 'Acadian Geology,' 

 p. 376, 1855. 



Fig. 89. — Spirifera glabra, Martin. 



"This appears to be a common fossil in the Lower Carboniferous 

 limestone of Nova Scotia. It is identical in character with those 

 found in Great Britain; one example brought home by Sir C. Lyell 

 measured 13 lines in length by about 17 in breadth. 



" It occurs at East River of Pictou, Mabou, Cape Breton, Windsor, 

 Brookfield, Merigomish, etc. 



^'' F^piriferina cyistala, Schlotheim (Fig. 90). 



^^ Spir/fcr octopUcatus, Sow., Min. Couch, pi. 562 (figs. 2, 3, 4); 

 Dav. Mon. Carb. Brach, p. 38, pi. 7 (figs. 37, 47). 



