90 



PLEUROTOMARIA VAGRANS. (N. sp.) 



Fig. 82. 



Fig. 82.Pleurotcmaria vagrans. View of the upper side ; a, transverse sec- 

 tion of the spire. In the principal figure, the band is too wide. 



Description. Discoidal; spire nearly flat ; whorls four or five, slender, 

 gradually increasing in size, on the upper side gently and nearly uniformly 

 convex, a narrow spiral band on the outer edge which is obtusely angular ; 

 outside of whorls gently convex ; lower side narrowly rounded along the 

 middle , umbilicus wide, extending to the apex. The last whorl is sepa- 

 rated from the others, and produced singly to a length of four or five 

 inches, gradually losing its curvature as it increases in length. Surface 

 with fine striae, and a few obscure undulations curving backwards from the 

 suture outwards. Width of the uncoiled portion of the spire when 

 consisting of four whorls, 15 lines ; width of outer whorl 3i lines ; width 

 of last whorl at four inches from the spire, 5 lines ; depth about 4 lines. 



Locality and Formation. Point Le*vis ; in limestone No. 2, Quebec 

 group. 



Collectors. Sir W. E. Logan, J. Richardson, R. Bell. 



