﻿THE 



CANADIAN EECOED 



OF SCIENCE. 



VOL. VII. JANUARY AND APRIL, 1896. Nos. 1 and 2. 



Description of a supposed new genus of Polyzoa 

 FROM the Trenton limestone at Ottawa.^ 



By Lawrence M. Lambe, F.G.S. 

 (With Plate I.) 



Astroporites. (Gen. nov.) 



Zoarium flat or slightly infundibuliform, circular, thin, 

 composed of perforated and poriferous, closely connected 

 segmentary divisions which radiate from a central point 

 and are added to by the intercalation, at intervals, of new 

 divisions as the distance from the nucleus increases. 



Astroporites Ottawaensis. (Sp. nov.) 



Zoarium forming a flat or slightly concave expansion 

 about 80 mm. in diameter, 3 mm. thick near the centre 

 and thinning toward the edge. It is divided radially into 

 narrow divisions, from 3 to 4 mm. broad, which increase 

 in breadth from their pointed proximal ends for a distance 

 of about from 4 to 10 mm. and then remain of about the 

 same breadth throughout their length. Fresh divisions 

 are added by intercalation as they become necessary for 

 the preservation of the disc-like form of the expansion. 



1 Communicated by permission of the Director of the Geological Survey of Canada. 



