170 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jail. 7, 



ber of T. sacculus and of its synonym T. sufflata. I think, therefore, 

 that it will be perhaps preferable to refer the Nova-Scotian Terebra- 

 tulce to Martin's T. sacculus ; and in this view I am supported by Prof. 

 de Koninck, notwithstanding some examples may resemble certain 

 specimens of T. elongata, T. fusiformis (Yern.), or T. hastata. The 

 largest specimen I have seen was not quite an inch in length, and the 

 greater number were much smaller. The interior, with its perfect, 

 short, simple loop, is often found, and is exactly similar to the one 

 we find in Martin's species. Sir C. Lyell mentions that he obtained 

 this shell at Windsor, Brookfield, Shubenacadie, Gay's River, Debert 

 River, Middle River, and Cape Breton. Dr. Dawson obtained it in 

 the same localities, to which he has added Pugwash, East River of 

 Pictou, Lennox Passage, &c. 



2. Athyris subtilita, Hall, 1852. PL IX. figs. 4, 5. 



AiJiyris subtilita, in Howard Stansbury's Exploration of the Yalley 

 of the Salt Lake of Utah, p. 409, pi. 2. figs. 1, 2. 



The Nova-Scotian specimens all appear to be small in size, but are 

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

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



This shell occurs by millions in the Lower Carboniferous limestone 

 of Shubenacadie, Brookfield, <fcc. 



Spirifer^:. 



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. 



3. Spirifera glabra, Martin, sp. PI. IX. figs. 9, 10. 



Conchyliolithus Anomites glaber, Martin, Petrif. Derb. pi. 48. 

 figs. 9, 10, 1809. 



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

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

 p. 376, 1855. 



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, &c. 



4. Spiriferijsa. cristata, Schlotheim. PI. IX. fig. 6. 



Spirifer octoplicatus, Sow., Min. Conch, pi. 562. figs. 2, 3, 4; Dav. 

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



At p. 221 of his ' Travels,' Sir C. Lyell mentions Spirifer cristatus, 

 Schl., Sjp. minimus, Sow., and $p. octojolicatus, Sow., as having been 

 found in the Lower Carboniferous limestone of Nova Scotia ; but it 

 is probable that at least two of the shells so termed, namely $p. 

 cristatus and Sp. octoplicatus, are referable to a single species. The 



