169 



Streptorhyn-chus planumbona, Hall 1883. Second Ann. "Rep. N. York St. Geolo- 

 gist, pi. 39, fi^s. 15-17, and pi. 42, figs 8-9. 



Strophomena planumbona (y-ATtim) Shaler. . .1SS7. Mein. Kentucky Geol. Surv., p. 13, 



pis. 4 and 5. 



Strophoynena ruffosa, Jiiill 1892. Pal. N. York, vol. VIII., pt. 1, p. 



247, figs. 13 and 14. 



Strophomena planumbona OT rugosa, Hall 1892. Ibidem, p. 251, pi. 9, figs, 1517, and 



pi. 11a, figs. 8 and 9. 



Strophomenn rugosa, Winohell and Schu- 



ohert 1893. Lower Silur. Brach. Minn., p. 390, 



pi. 31, figs. 4 and 5. 



Lower Fort Garry, T. C. Weston, 1884 : one specimen. 



An excellent summary of the various names that have been applied to 

 this and to the preceding species is given by Professor Winchell and Mr. 

 Schuchert, in their Lower Silurian Brachiopoda of Minnesota, from which 

 the preceding list of synonyms is quoted. 



Strophomena rugosa, var. subtenta. 



Strophomena subtenta, Conrad 1841. Fifth Ann. Rep., N. York Surv., p. 



37 (undefined). 

 Lepta'iin subtenta, Hall 1847. Pal. N. York, vol. I., p. 115, pi. 3lB, 



figs. 9, a-b. 

 Strophomena subtenta, Billings 1862. Geol. Surv. Canada, Pal. Toss., vol. 



I., p. 132, and fig. 109 on p. 130. 

 Strophomena ( HeTiiipronites) plicata (James), ^ 



Meek 1873. Rep. Geol. Surv. Ohio, vol. I., pt. 2, 



p. 81, pi. 6, figs. 4, a-b. 

 Strophomena subtenta, Whhe:a,ves 1880. Geol. Surv. Canada., Rep. Progr, 



1878-79, p. 470. 

 Strophomena rugosa var. subtenta, Winchell 



and Schuchert 1893. Lovi'er Silur. Brach. Minn., p. 393. 



Limestone Rapids, 100 miles up the Nelson River, Keewatin, Dr. R. 

 Bell, 1879 : two good specimens. 



Strophomena teilobata, Owen. (Sp.) 



Leptcena trilobata, Owen 1852. Geol. Surv. Wiscons., Iowa and Minn., 



p. 584, pi. 2, figs. 17 and 18. 



Strophomena trilobata,Miaer 1877. Amer. Pal. Poss., p. 138. 



Winchell & Schuchert. 1893. Lower Silur. Brach. Minn., p. 395, pi. 

 31, figs. 12 and 13. 



East Selkirk, L. M. Lambe, 1890: one large and well preserved but 

 imperfect dorsal valve. 



On Lake Winnipeg a few characteristic specimens of this species have 

 been collected at the following localities : At Bull Head, Big Grindstone 

 Point and Elk Island, by T. C. Weston, in 1884 ; at Deer Island by J. 

 B. Tyrrell in 1889 ; at Snake and Jack Head islands by D. B. Dowling 

 and L. M. Lambe in 1890 ; at the mouth of the Little Saskatchewan River 



