76 



CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



Species 



and 

 variety. 



H. catenu 

 laria, var, 

 micropora, 



Whitfield. 



■ 



15 



16 



Locality 



Derby township, 

 nr. Owen Sound, 

 Ont. 



Formation. 



Shape and 



average size of 



corallites. 



Niagara. 



Derby township, Niagara, 

 nr. Owen Sound. 

 Ont. 



17 Cross Lake Rapids, Niagara. 

 Saskatchewan R. 

 and Cedar Lake. 



H. catenula 



rii, var.,|5 

 simplex. 



H. catenula 

 ria, v a r . , . 

 amplitubula- (. 

 ta. 



NE side Columbia 



River, B.C. near 



Donald. 

 NE side Columbia 



River, B.C. near 



Donald. 

 Hespeler, Ont 



Upper Silurian 



Upper Silurian 



One mile east of 

 Little Cascape- 

 dia River, Que. 



Guelph , 



Lower Helder 

 berg. 



L'Anse a la Barbe, Lower Helder 

 - 22 Tanse au Gascon, 



'23 



Que. 



berg. 



H. catenula- 

 ria, var., ni- 

 tida. 



L'Anse a la Barbe, i Lower Helder- 



1' Anse auGascon, 



l'Anse aux Bou- 



leaux & l'Anse a 



la Vieille, Que. 



,24 Neigette Falls, Q. . 



berg. 



Lower Helder- 

 berg? 



Circular or oval 



L.lo0to200 mm. 

 Breadth. 150 " 



Broadly oval to cir- 

 cular. 

 Diameter 1 '25 mm. 



Oval to circular. . . . 

 From 3 by 2 mm. 

 to 1"5 by 1 mm. 



Broadly oval 



Length. .250 mm. 

 Breadth 2 00 ,, 



Oval 



Length .0 70 mm. 

 Breadth 45 .. 



Oval 



From 1- 50 by 100 

 to 350 by 2-50 

 mm. in different 

 specimens. 



Average 

 width of tu- 

 bules. 



Silicified 

 specimens, 

 structure 

 obscure, 



tubules not 

 seen. 

 75 



040 



Not seen. . . 

 Not seen. . . 



Not recog- 

 nizable. 



Oval Not present. 



Length . . 4 ' 00 mm. 

 Breadth..2 5 ,. 



Broadly oval 



L. 2-5 to 2-00 mm. 

 Breadth..l75 .. 



Oval 



Length . . 1 ' 45 mm. 

 Breadth.. I" 00 „ 



Same as No. 



2'0 to 2'25 



050 



23. 



