171 



Stropkomena delioidea, Vanuxem 1842. Geol. N. York, Kep. Third District,. 



p. 46, iiff. 2. 

 II ir Emmons 1842. Ibidem, Rep. Second District, p. 389, 



fig. 2. 

 Stropkomena camerata, Connid 1812. Journ. Ac. Nat. Sc. Philad., vol. 



VIII., p. 254, pi. 14, fig. 5. 

 Lephena camerata, Hall. 1847. Pal. N. York, vol. I., p. 106, pi. 31 A, 



figs. 2, a-b. 



Leptxna deltoidea, Hall 1847. Ibidem, p. 106, pt. 31 A, fig. 3, a-e. 



Stropkomena deltoidea, 'Billings 1863. Geology of Canada, i5. 163, fig. 141. 



Streptork!inchui{Strophonella)deltoidea,'H.ei.ll.lSSd. Second Ann. Rep. N.Y. St. Geol., 



pi. 42, figs. 1, 2, 4 (but not 3). 

 Eafinesquina deltoidea. Hall 1892. Pal. N. York, vol. VIII., pt. 1, pi. 



9 A, figs. 1, 2, 4. 

 Winohell&Sohuchert.l893. Lower Sikir. Brach. Minn., p. 403, 



pi. 31, figs. 30 and 31. 



Washow Bay, Lake Winnipegj T. C. Weston, 1884 : one ventral valve. 



Rafinesqdina alternata (Conrad, Ms.) Emmons. 



Leptcena alternata, Conrad 1838. Second Ann. Rep. N.Y. Geol. Surv. , 



p. 115 (undefined). 

 Strophomena alternata, Conrad 1838-41. Ibidem, Third Rep., p. 63 ; Fourth 



Rep., p. 201 ; and Fifth Rep., p. 37 (upde- 



fined). 

 Strophomena alternata, Emmons 1842. Geol. N. York, Rep. Second District, 



p. 395, fig. 3. 

 Orthis Huronensis, Castelneau 1843. Ess. sur le Syst. Silur. de I'Amerique 



Septentr., p. 37, pi. 14, fig. 6. 

 Orthis plana, Castelneau (not Pander) . , , . 1843. Ibidem, p. 38. pi. 14, fig. 1. 

 Strophomena angulata't Owen 1844. Geol. Expl. Iowa, Wiscons. and 111.,- 



pi. 18, figs. 1, 3. 

 Leptcena alternata. Hall 1847. Pal. N. York, vol. I, pp. 102 and 286, 



pi. 31, figs. 1, a-n; pi. 31a, figs. 1, a-i; and 



pi. 79, figs. 2, a-l. 

 Strophomena alternata, Billings 1856. Canad. Nat. and Geol., vol. I., p. 204, 



figs. 3 and 4 : and of numerous subsequent 



U. S. and Canadian paleontologists. 

 Bafinesquina alternata. Hall Pal. N. York, vol. VIII. , pt. 1, p. 281, pi. 8, 



figs. 6-11. 

 II II Winohell and Schu- 

 chert 1893. Lower Silur. Brach. Minn., vol. III., 



pt. 1, p. 404, (which see for a complete list 



of synonyms of this species), pi. 31, figs.- 



32-34. 



Lower Fort Garry, — where specimens were collected by D. Dale Owen 

 in 1848, by Dr. R. Bell in 1880, and by T. 0. Weston in 1884,— and 

 East Selkirk, where specimens were collected by A. McOharles in 1884.. 

 On Lake Winnipeg it was collected at Inmost or Birch Island, in Kinwow 

 Bay, by D. B. Dowling and L. M. Lambe in 1890, and in Keewatin it 

 had previously been collected on the Nelson River sixty miles from its. 



