192 



The specimen is 2J inches in length, curved on the ventral side to a 

 radius of 2J inches ; diameter at the aperture 11 lines, and at 1 J inches 

 from the aperture 8 lines ; depth of chamber of habitation 14 lines. 



This species resembles 0. Syphax very closely ; but as the chamber of 

 habitation is nearly twice the depth, the form of the animal must have been 

 different. I venture, therefore, to classify it as a distinct species, but 

 should this separation turn out to be erroneous, I beg that both forms may 

 be referred to 0. Metellus. 



Locality and Formation. Point LeVis ; limestone of the Quebec 

 group. 



Collectors. R. Bell, T. C. Weston. 



CYRTOCERAS DICTYS. (N. sp.) 



Fig. 176. 



Description. Shell moderately curved ; section elliptical, the dorso- 

 ventral being, as nearly as can be ascertained, one-fourth greater than 

 the lateral ; septa between forty and fifty to the inch, with several slight 

 undulations ; shell apparently smooth. 



The best specimen collected is a portion of the larger extremity. It 

 is 11 lines in length ; the dorso-ventral diameter is 7 lines at the larger 

 extremity and 5 at the smaller ; the ventral contour is arched to a radius 

 of about 16 lines, but it is most probable that towards the apex it becomes 

 more sharply curved. 



Although a number of fragments of this species have been observed, I 

 have not been able to ascertain the position of the siphuncle. The 

 dimensions of the chamber of habitation are also undetermined. 



This species is distinguished by its numerous thin and closely crowded 

 septa. 



Locality and Formation. Point Le*vis ; limestone of the Quebec 

 group. 



Collectors. J. Richardson, R. Bell. 



