34 



shews a number of small rounded spiral ridges from i a line to 1 line 

 apart crossed by very fine but distinct lines of growth. It seems probable 

 that much of the shell is ornamented in this way. 



Fig. 34. 



Fig. 35. 



Fig. 34. — Murchisonia Hermione, front Tiew of a cast of the interior. Fig. 35. poste- 

 rior view of the same specimen a. a portion of the surface a little enlarged. 



Length of specimen 2| inches ; width of body whorl and aperture 2 

 inches ; height of aperture li inches ; width of the same about 1 inch. 



Locality and Formation. — South point of Large Island, Mingan 

 Islands. Chazy or Black Eiver. 



Collector. — J. Eichardson. 



Murchisonia Proceis. (N. sp.) 



Description. — Short, conical, very like a small M. belUeincta but more 

 obtuse. Whorls five or six, uniformly and rather strongly ventricose; 

 apical angle about 50°. Aperture oval somewhat efiuse below. Surface 

 with fine but very distinct hues of growth which have a rugose aspect, 

 from six to eight in the width of one hne. About the middle of the whorl 

 there is what appears to be a wide flat spiral band bounded on the lower 

 side by a very distinct thread-hke ridge. The upper side of the supposed 

 band is not distinguishable in the specimen owing to the imperfection of 

 the shell. 



Length of specimen 1 inch ; width of last whorl including aperture 7 

 lines ; width of aperture 4i lines ; height of the same 5^ lines. 



Locality and Formation. — Paquette Rapids on the River Ottawa. 

 Black River limestone. Rare. 



Collector. — E. Billings. 



