201 



"Shell large, attaining to a length of upwards of five inches, tere- 

 briform, elongated and nearly three times as long as broad : spire, as 

 measured on the dorsal side, occupying not quite two-thirds the entire 

 length : apical angle 27°. Volutions ten, allowing for " a possible apical 

 one, which is not preserved in any of the specimens collected, " increasing 

 slowly in size and obliquely compressed, the later ones slightly constricted 

 above and moderately inflated below, those of the spire much broader than 

 high : suture distinctly impressed : outer or last volution a little higher 

 than broad, moderately convex but scarcely ventricose in the middle and 

 narrowing abruptly into the somewhat pointed base. 



" Surface of the spire nearly smooth, that of the last volution marked 

 only with a few flexuous lines of growth, which curve gently and con- 

 cavely backward above, and still more gently forward below. 



" Four fine large specimens of this species, each with nearly the whole 

 of the test preserved, have been collected at as many different localities 

 on or in Lake Winnipeg." Two of these specimens were collected by 

 Mr. Weston in 1884, one at Stony Point and one at Jack Fish Bay; one 

 by Mr. Tyrrell in 1889 at Little Black Island, and one by Mr. Bowling 

 in 1891 at Dog Head. 



" Nine volutions are preserved in the most perfect of these specimens, 

 the slender apex of each being broken off. In the perfect shell there 

 must have been at least ten and probably as many as eleven volutions. 

 The species is of considerable interest on account of its strikingly close 

 similarity to some of the most typicalJurassic species of Pseudomelania.'' 



PTEROPODA. 



CONDLAKIA ASPERATA, BilHngS.. 



Plate 21, figs. 2 and 2 a. 



Oonularia asperata, Billings : 1866. G-eol. Surv. Canada, Cat. Silur. Foss. 



Isld. Anticosti, p. 21. 

 Cfr. Oonularia formosa. Miller and Dyer. . .1878. Journ. Cinoinn. Soo. Nat. Hist., vol. 



I, p. 38, pi. 1, figs. 12 and 12a. 



A few good specimens, which seem to be essentially similar to the type 

 of C. asperata from Macastey Bay, Anticosti, were collected from hme- 

 stone exposures at Cat Head by T. C. Weston in 1884 and by D. B. 

 Dowling in 1891 ; also at Inmost or Birch Island, in Kinwow Bay, by 

 T. C. Weston in 1884; and by D. B. Dowling and L. M. Lambe in 1890. 

 Similar specimens were collected from loose pieces of limestone at Rein- 

 deer Island by D. B. Dowling in 1890, and at Big Sturgeon Island by D. 

 B. Dowling and L. M. Lambe in the same year. 



In the type of C. asperata from Anticosti, and in all the specimens of 

 that species from Lake Winnipeg that the writer has seen, each of the 



