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lected at Lower Fort Garry, and at Dog Head, Lake Winnipeg, by Mr.. 

 Weston in 1884; at Big Island, by Mr. Tyrrell in 1889; at Black Bear 

 Island (near Snake Island), by Messrs. Dow ling and Lainbe in 1890; and 

 at Commissioners (or Cranberry) Island by Mr. Dowling in 1890." 



" The largest specimen in which any considerable portion of the test is 

 preserved is the one from East Selkirk collected by Mr. McCharles, the 

 posterior moiety of which is represented by fig. 2, on Plate 5 " of the 

 ninth volume of Transactions of the Royal Society of Canada. " It is 

 upwards of seventeen inches and a half in length, three inches and a half 

 in thickness at the smaller end and about four and a quarter at the 

 larger. It is septate throughout, and its transverse annulations are com- 

 paratively narrow, there being five to an inch. The largest specimens 

 without the test are upwards of two feet in length, and imperfect at both 

 ends, while a large fragment, which, however, has been abnormally com- 

 pressed, is eight inches in breadth by about fifteen in length. All of 

 these also are septate throughout, and, so far, not a trace of the chamber 

 of habitation can be found in any of the specimens from Manitoba. This 

 is the more remarkable when it is borne in mind that the Wisconsin 

 specimen of E. suhannulatwm figured by Professor Whitfield, which is 

 represented as only two inches in breadth at the larger end, has no less 

 than three inches and three-quarters of the body chamber preserved and 

 only about an inch and three-quarters of the septate portion of the shell. 



" In Endoaeras annulatum the septa are stated to be ' more approxi- 

 mated than the annulations,' but in the present species the opposite is 

 the case, the sutures of the septa being usually about twice as far apart 

 as the breadth of the annulations. In the Manitoba specimens, which 

 may possibly prove to be distinct from the typical E. subannulatum,. 

 there is a considerable amount of variation in the proportionate thickness 

 of the annulations. Some medium-sized ones, a little less or a little 

 more than two inches in thickness, have as few as three or four annula- 

 tions to the inch and others as many as six. The annulations, although 

 always rounded at the summit, are by no means always ' low,' as 

 described by Professor Whitfield, but are often so prominent as to give a 

 strongly ribbed appearance to the shell, and the concave spaces between 

 them are not infrequently broader than the annulations themselves. 



" Detached siphuncles of this species are by no means rare in Manitoba, 

 the largest known to the writer (from Big Sturgeon Island) being fifteen 

 inches and a-half in length, nearly one inch and a quarter thick at its 

 smaller end, and two inches and an eighth at its larger. The very large- 

 and apparently single siphuncular sheath is elongated, conical and rather 

 thin walled, the test of the wall being about half a millimetre thick. The- 

 endosiphon has not been observed." 



