52 CANADIAN PERIOD. 



in the space of an inch, while onr species has from thirty-fovu- to thirty- 

 six in the same space. That species is represented as having small mncronate 

 appendages at the cell-apertures, which those of our species are destitute of, 

 but are provided instead with a thickened projecting lower lip. 



Dedicated to the memory of Mr. F. W. Loring, who was murdered by 

 the Apache Indians in October, 1871, while a member of one of the explor- 

 ing parties. 



Position and locality. — Strata of the age of the Quebec group of Canada; 

 Fish Spring, House range, Utah. 



MOLLUSCA. 



MOLLUSCOIDEA. 



Class BRACHIOPODA. 



Oeder LYOPOMATA. 

 Family LINGULID^. 



* Genus LINGULA Brugniere, 1789. 



Lingula? manticula \Vljite. 



Plate in, fig. 2 a .and b. 



Lingula? manticula White, 1874, Exp. & Surv. west lOOtli Merid., Prelim. Rep. Invert. 

 Foss., 9. 



Shell small elongate-subovate or subelliptical in outline, broadest at or 

 a little beliind the middle ; beaks pointed. 



Dorsal valve proportionally wider than the ventral, moderately convex; 

 postero-lateral margins nearly straight, meeting at the beak at an angle of 

 nearly forty -five degrees ; beak small, depressed ; front margin regularly 

 rounded. 



Venti'al valve proportionally longer than the dorsal in consequence of 

 the considerable projection of its beak behind that of the dorsal valve; the 

 whole valve, except its jDrominent beak, corresponding nearly with the whole 

 of the opposite one, but its posterior portion is a little more convex trans- 

 versely than any part of the other valve is ; the beak is more prominent 



