New Fossils from the Winnipeg Limestones. 393 



fiabellate cliductors of that valve are very similar in shape 

 to those of R. alter nata, as figured by Hall on Plate 8, 

 figure 4, of the eighth volume of the " Palaeontology of the 

 State of New York," though their external margins are 

 very much less distinctly defined. 



Apparently not uncommon in the Bed Kiver valley at 

 Lower Fort Garry, — where it was collected by Donald 

 Gunn in 1858, by Dr. P. Bell in 1880, by T. C. Weston in 

 1884, and D. B. Dowling in 1891,— and at East Selkirk — 

 where specimens were obtained by T. C. Weston and 

 A. McCharles in 1884. From the limestones of Lake 

 Winnipeg it has so far been collected only at Cat Head 

 (by T. C. Weston in 1884 and D. B. Dowling in 1891), 

 and at Jack Head Island (by D. B. Dowling and L. M. 

 Lambe in 1890). 



Altogether, the writer has seen fourteen specimens of 

 this shell, three of which shew the characters of the hinge 

 area of both valves fairly well, though the beak of the 

 dorsal valve cannot be seen in either, as it is either broken 

 off or buried under the matrix. The ventral aspect of 

 these specimens is remarkably similar to that of the 

 fossil figured by Professors Winchell and Schuchert on 

 Plate xxxi., figures 35 and 36, of the " Lower Silurian 

 Brachiopoda of Minnesota," as Rafinesquina alternata, var. 

 loxorhytis, but which, Mr. Schuchert has recently informed 

 the writer, he now regards as a form of R. Kingii, the 

 Strophomeua Kingii of Whitfield. Mr. Schuchert, how- 

 ever, who lias seen all the specimens from Manitoba upon 

 which the preceding description is based, states that their 

 hinge areas are always nearly three and even four times 

 as high as those of the Minnesota specimens of R. Kingii 

 which he has studied, and regards this as a valid distinc- 

 tion between them. Professor Whitfield, also, who has 

 seen some of the most perfect Manitoba specimens of 

 R. lata, regards them as specifically distinct from his 



