150 Notes on the Geology of Murray Bay. 



Logan in "his report aboye referred to, has in my view given the 

 true explanation of these mounds, which maybe seen in all stages 

 of formation on the neighbouring hill sides. Their effect to a 

 geological eye is to give to this beautiful valley an unfinished as- 

 pect, as if the time elapsed since its elevation had not been suffi- 

 cient to allow its slopes to attain to their fully rounded contour ; 

 but this appearance is no doubt due to the enormous thickness of 

 the deposit of Post-pliocene mud, to the uneven surfaces of the 

 underlying rock, and possibly also in part to the earthquake 

 shocks which have visited this region. 



My subject in this paper has been the geological history of 

 Murray Bay, but its modern natural history is not without at- 

 traction. Its varied surface and formations afford a copious flora. 

 Its abundant sea weeds have been already noticed in this Journal 

 by Mr. Kemp. The beautiful white porpoises that sport in its 

 waters, and a variety of interesting fishes may be well studied 

 here. The marine invertebrates are not very abundant, and the 

 rocky nature of the bottom and rapid tidal current, render dredg- 

 ing difficult and dangerous, but many interesting forms charac- 

 teristic of the upper ranges of the St. Lawrence estuary occur. 

 Even the ethnologist may find something interesting in the pecu- 

 liarity, of a colony of Scotsmen, isolated by the neglect of their 

 countrymen, and changed in the course of two generations, in 

 language, manners, and religion, into French Canadians. 



Description of the new species of Lingvla referred to in th£ fore- 

 going paper. By E. Billings. 



LiNGULA Eva. — (Billings.) 



Description. — Shell from 1 to 1 ^ inch in length, greatest width 

 near the front margin, thence gradually tapering with nearly 

 straight sides until within one fourth of the length from the beak, 



