240 



on comparison, -will be found constantly a little different from similar 

 sections of M. Magna. 



The only differences I can perceive between M. affinis and this species, 

 are in the much greater size and thickness of shell of the latter. 



Locality and Formation. — P, Cow Head, Newfoundland; and also 

 near PhiUipshurgh, Canada East. It occurs most abundantly at Correy's 

 farm, about five miles north of PhilUpsburgh, on the road to Bedford, in 

 band C 1, of the PhilUpsburgh series. 



Collectors. — J. Richardson, at Cow Head ; E.Bilhngs, at Philhpsburgh. 



Maclurea acuminata. (N. sp.) 



Fig. 225. 

 Pig. 225. — Maclurea acuminata. A cast of the interior. 



Description. — Shell from two to four inches across ; spire flat, the 

 middle sometimes a little convex ; suture closely compressed, in the cast 

 of the interior deeply excavated ; outer edge thin and acute ; whorls three 

 or four. The base is depressed hemispherical ; umbilicus very small, and 

 in some specimens apparently closed altogether. Surface with fine striae, 

 those on the base seem to be rather coarse. 



This species is easily recognized, even when in the condition of casts, 

 by its margin, which is often much more acute than is represented in the 

 above figure. 



The largest specimen collected is 3|- inches across, and consists of 

 about Sh whorls, the last one being 12 lines wide at the aperture. The 

 height is about one-third the width. 



LocaHttj and Formation. — K, L, M, N, Table Head and Point Rich, 

 Newfoundland ; Quebec group. 



Collector. — J. Richardson. 



Maclukba speciosa. (N. sp.) 



Fig. 226. 

 Fig. 226. — Maclurea speciosa. The spire. 



