402 CONTRIBUTIONS TO CANADIAN PALAEONTOLOGY. 



portion of the last volution is obliquely iSattened above and bciopp-, and 

 the volution itself is encircled with four low, obtusely angulai- spiral 

 ridges, one on each side of the periphery, one about half way between the 

 suture and the upper or posterior margin of the periphery, and one which 

 forms the umbilical margin. 



EuoMPiiALUs (Phanekotinus) laxus. 



EiwmpliMlas liixHi:, Hall. 18C1. Descrijitions of New Fossils, etc., p. 2G. 



1863. Fifteenth Rep. N.Y. St. Cab. Nat. Hist., p. 54, pi. 6, 

 fig. 2. 

 Eiioiiipludiis (EccuUoiiiphjilus?) lu'.rv:!, Hall. 1H7C. Illustr. Devonian Fo.ssils : Gastero- 

 poda, pi. 16, figs. 16-18. 

 ErcAilioinpiialv^ coine!<. Hall. 1876. Ibid., \)\. 16, figs. 8 and 9. 



Bvomphalus ( PhanerotinvxJ l,i:rvs, Hall. 1879. Pal, N. York, vol. V., pt. 2, p. 60, ].l. 



16, figs. 8, 9, and 16-18. 



In the Museum of the Survey there are seven specimens, that are 

 clearly referable to this species, which were collected in the Hamilton 

 formation of the Township of Bosanquet, by Mr. Johnson Pettit, in 18C8. 

 Only one of these has any portion of the test preserved, the other six 

 being mere decollated casts of the outer volution of the shell. A fine 

 specimen, with two volutions and most of the test preserved, which is 

 also referable to this species, was collected at Thedford, in 1897, by Mr. 

 R. Mackintosh, who has kindly presented it to the Museum of the Survey. 



Tiie specimens from lakes Manitoba and Winnipegosis that are identi- 

 fied witli the Euomphalus anntdatus of Phillips, on pat^e 325 of the 

 fourth part of this volume, and figured on Plate 4.3, (figs. 1, la, & 2) 

 seem to differ from this species only in being much more closely coiled. 



Loxonema (Species undeterminable). 



Two casts of the interior of the shell of a rather slender species of 

 io,'/;o?iema, labelled simply " Widd^r," are among the old collections of 

 the Survey, and were probaVjly collected at least thirty years ago. Both 

 of these casts are very imperfect posteriorly, but the more perfect of the 

 two is two inches in length and has four volutions preserved, those of the 

 spire being rather strongly convex, with an oblique suture. Scarcely 

 any vestige of the test is preserved on either, but the cast of the last 

 volution of each is marked Vjy coarse, distant, floxuous, transverse 

 plications. These specimens do not seem to agree very well with Hall's 

 description and figures of any of the species of Loxom^ma from the 

 Hamilton formation, in the second part of the fifth volume of the 

 Pahcontology of New York, but come rather close to the L. pPM-rUa of the 

 Upper Helderberg limestone, and especially to the two specimens repre- 

 sented by figures 11 and 12 of Plate 13 of that volume. 



