61 



number of P. ajfinis, the difference at once becomes apparent. Few 

 naturalists would refer the two groups to the same species. 



Locality and Formation. — Indian Cove, Gaspd; limestone No. 8. 



Collectors,—!^. Bell, T. C. Weston. 



Pleurotomaria voltumna. (N. sp.) 



Plate 5, figs. 5, oa. 



Description. — Shell sub-turbinate or sub-globose ; apical angle between 

 90^ and 100^ ; spire consisting of about three rounded or obscurely 

 lenticular whorls with a three- grooved band about the mid-height; aper- 

 ture obscurely sub-rhomboidal, with, apparently, a tendency to become 

 effuse at the lower angle; umbilicus very small. Surface with rather 

 coarse tranverse striae, about three in the width of one line, curving back- 

 wards from the suture to the band. Width, fifteen lines ; height, thirteen 

 lines ; width of the band near the aperture, about two lines. 



Of this species only one imperfect specimen has been collected. The 

 surface of the whorl, above the band, slopes upwards to the suture, with a 

 gently convex curve, slightly more flattened just above the band than near 

 the suture. The same form prevails below the band where the curve of 

 the surface, at first moderate, becomes abruptly convex around the 

 umbilicus. 



The band, in this specimen, consists of three concave grooves, the lower 

 one, as seen on the body whorl, being the largest, and the upper the 

 smallest, the three near the apenture occupying a width of about two lines. 



Locality and Formation. — Grand Greve, Gasp^ ; Gaspe limestone 

 No. 8. 



Collector. — R. Bell. 



Pleurotomaria delta. (N. sp.) 



Plate 5, fig. 3. 



Description. — Turbinate ; base convex ; spine of three or four whorls, 

 obliquely conical ; apical angle 90*^ or a little more ; a band about the 

 mid-height ; umbilicus minute or closed ; height, about twelve lines ; width, 

 fifteen to eighteen lines. The base of the body whorl is strongly convex ; 

 the band on approaching the aperture is situated above the mid-height, but 

 receding therefrom it gradually gains a position on the outer edge of the 

 whorl ; in the upper whorls it seems to be concealed in the suture. The 

 upper side of the body whorl, near the aperture, above the band, ascends 

 with a gently convex or nearly flat slope to the suture ; approaching the apex 



