245 



MACLUREA ROTUNDATA. (N. sp.) 



a b 



Fig. 231. 



Fig. 231. Maclurea rotundata. a, front view of a cast of the interior ; 6, view of the 

 base. 



Description. Shell about two inches across, strongly convex ; spire 

 flat, the inner whorls sometimes a little elevated above the outer ; whorls 

 about three, flat on the upper side ; margin narrowly rounded ; umbilicus 

 half the whole width, with the edge narrowly or acutely rounded ; whorls 

 in the umbilicus gently convex. Surface unknown. 



Width of specimen figured 18 lines ; height of aperture 12 lines ; 

 width of umbilicus 9 lines ; width of last whorl at the aperture 7 lines. 



This species is closely allied to M. Emmonsi from which it differs in 

 having the upper side of the whorls flat, even in casts of the interior, and 

 in its somewhat narrower umbilicus. M. Psyche has the umbilicus still 

 narrower and penetrating only half the height of the shell. 



Locality and Formation. Bonne Bay, entrance to the north arm, and 

 also east arm, south-west side, Newfoundland ; Quebec group. 



Collector. J. Richardson. 



OPHILETA NERINE. (N. sp.) 



Fig. 232. 

 Fig. 232. Ophileta Nerine. a, base ; b, the spire. 



Description. Smaller than 0. compacta; spire gently concave ; margin 

 acutely rounded. Lower side deeply concave, with the whorls strongly 



