246 



angular along the middle ; the edges of all the whorls seen in the umbili- 

 cus. In the smaller specimens the outer side of the whorls slope inward 

 at an angle of about 75, but in the larger ones it is more nearly vertical. 

 The inner slope of each whorl (from the angular edge which runs along 

 the middle on the lower side), into the umbilicus, is flat; the slope out- 

 wards (or the outer side of the whorl) is gently convex. 



In a specimen 8J lines wide, there are four whorls ; width of last whorl 

 at the aperture 2 lines ; depth about the same. The largest specimen 

 seen is 15 lines wide. Surface finely striated parallel with the aperture. 



This species is certainly closely allied to 0. compacta^ and it is not with- 

 out much hesitation that a new name is proposed for it. The following are 

 the differences : In 0. compacta the spire is always flat, and the lower 

 side of each whorl (or that side which slopes into the umbilicus) concave. 

 In this species the spire is always gently concave, and the lower side of the 

 whorl flat. 0. compacta is, also, a much larger species, being usually 

 from 20 to 30 lines, while of 0. Nerine, although found in immense num- 

 bers, the largest seen is 15 lines wide, and all the others seen, from 3 to 8 

 lines wide. 



Although a new name is proposed, I think it only a variety, and further 

 that 0. compacta and 0. complanata are also varieties of the same 

 species. 



Locality and Formation. F, Bay of St. John, Newfoundland ; 

 Quebec group. 



Collector. J. Richardson. 



OPHILETA UNIANGULATA. (Hall.) 



EUOMPHALUS UNIANGDLATUS, (Hall.) Pal. N. Y., vol. 1, p. 9, pi. iii, figs. 1, la. 



Remarks. This species occurs at Cow Head in Division P. It 

 occurs also in the limestones at Point Levis in Band 4, and at Bedford in 

 C 1, Geol. of Can. p. 845. 



