263 



Strophostylus filicinctus, Whiteaves. 



Plate 30, figs. 4, 5 and 6. 



Strophostylus filiciiictuSyWhiteB.vea 1904. Geol. Snrv. Carada, Ann. Rep., vol. 



XIV, pt. F, p. 54. 



" Shell depressed turbinate and wider than high, spire rather short, less 

 than half as high as the outer whorl, as viewed dorsally. Whorls six or 

 perhaps seven, rounded but slightly flattened at the suture above, increa- 

 sing rapidly in size, the outer one strongly inflated, ventricose and imper- 

 forate at the base. Aperture subcircular, lip thin and simple. 



" Surface marked with extremely minute and close set, low, rounded, 

 spiral raised lines, and by fine transverse strise of growth. On the last 

 volution but two of one specimen there are nineteen of these spiral raised 

 lines, and four and a half in a inillimetre. On the outer whorl of an 

 apparently adult specimen, and near the aperture, there are three spiral 

 raised lines to a mm. 



" Portage road at falls : two specimens, with the minute surface mar- 

 kings well preserved. One of these (fig. 6) is a testiferous specimen with 

 nearly the whole of the spire preserved, but with the outer whorl almost 

 completely broken ofi^; and the other (fig. 4) a cast of the interior of the 

 last two whorls of the shell of an adult specimen, with a small piece of 

 the test preserved, at and near the aperture. Beside these there are four 

 specimens that are probably referable to this species, though none of 

 them show any trace of the minute spiral lines upon the exterior of the 

 test. Three of these are from the portage road at the iPalls, and one from 

 the foot of the portage road. 



" This species would seem to be congeneric with Cyclonema caneellatum 

 of Lindstrom, from the Silurian rocks at Gotland, which Ulrich says is a 

 Strophostylus. " 



Cephalopoda. 



Endoceras (or Nanno) sp. indet. 



Portage road at falls : two fragments of siphuncles, or of a siphuncle, 

 that are presumed to be referable to either Endoceras or Nanno, on 

 account of their resemblance, in a general way, to specimens collected at 

 Kingston Mills, Ont., in 1902, by Dr. R. W. Ells, Mr. W. A. Johnston, 

 and the writer. 



AcTiNOCERAS Keewatinense, Whiteaves. 

 Plate 30, figs. 7 & 8. 

 Upper rapid : two distorted fragments. 



