258 THE CANADIAN NATURLIST. [Vol. vi. 



of the Royal Society. For figures of the species, I inny refer to 

 that memoir, and to my previous papers published in the Natur- 

 alist. 



(2) Fori/era. 

 Tefhea Logan i\ Dawson. 



Leda clay, Montreal. This species has not yet been recognised 

 in a living state, though allied to Tctliaa /u's/^/c/a, Bowerbank, 

 of the coast of Maine. Its spicules in considerable masses, look- 

 ing like white fibres, are not uncommon in the Post-plioc3ne at 

 Montreal. 



Tethea ? 



Another sillcious sponge is indicated by little groups of small 

 spicules found at the Tanneries, near Montreal, by Mr. G. T. 

 Kennedy, and at Riviere-du-Loup by the author. Its spicules 

 nre long and aceratc, and much more slender than those of Tethea 

 Lognni. They resemble those of T. hlsplda, recent on the 

 coast of Maine, and also those of a species of Polymastia, 

 dredged by Mr. AVhiteaves in the Gulf of St. Lawrence. 



Class 11.™ Anthozoa. 



Class III. — Hydrozoa. 



No distinct organisms referable to the above groups have yet 

 been found in the Post-pliocene deposits of Canada. As our 

 recent fauna includes no stony coral, and the recent species of 

 the Gulf of St. Lawrence have no parts likely to be preserved 

 other than minute spicules, this is not to be wondered at. In 

 washino; the clavs for Foraminifera, however, numerous fra2;ments 

 are obtained, which resemble portions of the horny skeletons of 

 hydroids, though not in a state admitting of determination. 



Class IV.— Eciiinodermata. 

 (1) Ojohiurldea. 



Ojpliioghjplia Sarsil, Lulken. 



Fossil — Loda cl;iy, neir St. John, N. Brunswick ; Mr. Matthew. 



Recent— River St. Liwrcnc3, at Murray B.iy; also found 

 of l:irge size in deep water in the Gulf of St. Lawrence, by Mr. 

 Whitcaves. 



