62 



the whorls become more convex. The band appears to be rounded and 

 about one line wide at the aperture. The aperture is somewhat effuse 

 below. Surface with fine striae and some stronger ridges of growth near 

 the aperture. 



Locality and Formation.— Grmd Grev6, Gaspe ; limestone No. 8. 

 Collector. — R. Bell. 



Pleurotomaria lydia. (N. sp.) 



Plate 5j figs. 4, 4a. 



Description. — Sub -turbinate, turreted ; spire of three or four whorls, 

 somewhat oblique ; apical angle 90^ or a little greater ; umbilicus open, 

 about one-fourth the width of the base. Height, ten or twelve lines ; width, 

 twelve or fourteen lines. The outside of the body-whorl, near the aperture, 

 is nearly vertical, gently convex, more rounded as it recedes towards the 

 apex. The band is situated on the upper outer margin of the whorl, and is 

 indicated in this position, on the cast of the interior, nearly to the apex. 

 Above the band the surface of the whorl is nearly flat, and nearly at a 

 right angle to the vertical axis of the shell at the aperture, but becomes 

 more convex as it approaches the apex. The umbilicus appears to be about 

 one -fourth or one-third the whole width of the base. The aperture appears 

 to be somewhat effuse at the lower angle. The base of the whorl around 

 the umbilicus is uniformly convex, becoming obscurely angular at the 

 aperture . 



Surface with fine striae, curving backwards above the band and forwards 

 below. 



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

 Collector, — R. Bell. 



Bellerophon plenus. (N. sp.) 



Plate 5, figs. 8, 8a, 8i. 



Bescription' — The casts of the interior of this species are broadly 

 rounded on the dorsum ; narrowly convex around the umbilicus ; the 

 aperture transversely expanded. In the tranverse section the inner side 

 of each whorl is indented to the extent of one-third, by the dorsum of the 

 preceding whorl. The umbilicus, measured across from the most project- 

 ing points of the whorl around it, is about one-third the whole diameter of 

 the sheJl. It diminishes in width rapidly inwards. The keel appears to 

 be about one line wide at the aperture. None of the surface characters 

 are seen on the casts, except some obscure wrinkles on the dorsum which 



