Bivalve Shells of Nova Scotia. 



129 



4. Anthracomya ovahs, Dawson. 

 11 



Fig. 11. — Anthracomya ovalis, Lower Carboniferous. Parrsboro, 

 enlarged x 2. 



Supplement to Acadian Geology, 1860 ; Salter, Journal of Geo- 

 logical Society, 1. c, 1863 ; Acadian Geology, second edition, 

 p. 205 ; Wheelton Hind, Journal of Geological Society, 1. c. 

 This species has the general form of the smaller speci- 

 mens of elongata, but is broader behind and more tumid in 

 front, so as to be at once distinguishable by the eye. It 

 occurs sparingly in beds from the millstone grit and lower 

 Carboniferous to the middle coal-formation. 



Our specimens are from the South Joggins, Eiversdale 

 and Parrsboro. It may be compared with A. dolabrata of 

 England, but is always much smaller. 



5. Anthracomya obtenta, Dawson. 

 12 



Fig. 12, — Anthracomya obtenta, Middle Coal-formation, Mabou, 

 Cape Breton, natural size. 



Acadian Geology, second edition, p. 205, (as A. obtusa, a name 

 which I find was pre-occupied for a species now included in 

 this genus.) 13 



Fig. 13. — Anthracomya obtenta, Coal-formation, Pictou, restora- 

 tion of a flattened and imperfect specimen, enlarged x 2. 



