228 



section shows that the outer margin, is thin and sharp, and that the 

 aperture is most probatly not rhomboidal but transversely elliptical, the 

 outer angle acute and the inner probably narrowly rounded. The form 

 is thus like that of P. lapicida (Salter), diifering therefrom in being 

 larger and in having a wider umbihcus ; the whorls abo are not so flat 

 above, and not so convex below. 



Locality and Formation. — G, Cape Norn an, Newfoundland ; Quebec 

 group. 



Collector. — J. Richardson. 



Pleurotomakia Hyale. (N. sp.) 



Description. — Shell rather small, lenticular ; spire depressed convex, 

 the whorls sHghtly elevated above each other at the suture, flat or with a 

 barely perceptible convexity on .the upper side ; base a little more strongly 

 convex than the spire. Umbilicus either very narrow or completely closed. 

 Surface unknown. 



Width about 9 Hues ; height 4 to 6 lines. 



The character of the margin has not been clearly ascertained, but it 

 appears to be acute, ard probably has a very narrow band on the edge. 

 The shape may be described as -s'sntricose-lenticular, both spire and base 

 moderately convex, and the peiipheral edge being at about the mid-height, 

 or a httle above. It resembles P. Progne, Creel. Can., p. 181, f. 176, 

 but is a smaller species, and has t'le A\horls sHghtly elevated above each 

 other at the sutures. 



Locality and Formaiton.— 'E, Kej2;cl Island and Port aux Choix, 

 Newfoundland; Queb c group. 



Collector. — J. Richardson. 



Pledrotomaeia Noemani. (N. sp.) 



Fig. 212. 

 Fig. 212. — rieurotomaria Normani. 



Description. — The specimen on which this species is founded is an 

 imperfect cast of the iaterior. Width at the base twenty-four lines; 



