344 



The Laiorenciaii Formation. 



Silurian upwards througli all the formations, yet only two are 

 living at the present day, of which R. psittacea is one. The race 

 is on the decline, and will perhaps soon become extinct. It be- 

 longs to the class Brachiopoda, so fully represented by the fossila 

 of the lower Silurian rocks of Canada. At Beauport, where the 

 specimen figured was procured, R. psittacea occurs plentifully at 

 the base of the bed holding the SciMcava. Specimens may be 

 procured there with both valves in connexion. Living in the seas 

 of Newfoundland, Labrador, Greenland and Norway ; fossil in 

 the drift of Ayrshire and Bramerton, Scotland, and at Beauport,. 

 Canada. 



Rhynconella, from the Greek, rJiynJcos, a beak; psittacea^ from 

 psittacus^ a parrot. The other living species is R. nigricans, found 

 in the seas of New Zealand. 



Fig. 12. 



Fig. 13. 



Fig. 12. — Rhyncondla psittacea. 

 F)<r. 13. — Balanus Uddevaliensis, 



Fig. 13. Balanus Uddevalensis is one of the loose valves of a 

 large species of Balanus. These animals belong to the sub-king- 

 dom Articulata, class Cirrhipeda. The fragments have a light 

 grey or bluish colour, and are rather plentiful at Beauport. The 

 living barnacles adhere to stones, floating pieces of wood, shell, 

 fish, &c. In the Township of Gloucester, in the excavation made 

 for the Ottawa and Prescott Railway, near Cunningham's Farm, 

 many of the small boulders had the barnacles which lived in the 



