DEVONIAN ROCKS OF CANADA WEST. 137 



Locality and Formation. — Rather common in the Corniferous or 

 Onondaga limestone on Eama's farm, Port Colborne. 







Fig. 28. — GysHphyllum aggregatum, 

 (View of part of the specimen iu the cabinet of the Canadian Itistitufce.) 



Cystiphyllum aggregatum. — (Billings.) 



The only specimen of this very distinct species that has come under 

 my observation is in the cabinet of the Canadian Institute. It con- 

 sists of a mass of cylindrical corallites closely aggregated and in places 

 united by projecting folds of the outer wall, as in the genus Erich' 

 pTiyllum. The individuals are completely enveloped in a thin epitheca. 

 which is obliquely wrinkled and filled with small sub -lenticular cells, 

 one or two lines in width. Diameter of longest corallite in the 

 group, one inch, and of the smallest, five-eighths of an inch. 



I believe that this is the first aggregated Cystiphyllum yet discovered, 

 and one of its characters, that is to say the manner in which the 

 corallites are connected, seems to shew that the distinction between 

 Eridophyllwn and Biphyphyllum is not of generic importance. The 

 difference between the genera consists in the presence or absence of the 

 processes that unite the individuals of the colony, and as this is of 

 specific value and no more in Cystiphyllum, it may be so in the others. 



Locality andformation.—'Nea,Y Simcoe. 



Cystiphyllum Senecaense. — (Billings.) 

 This species is elongate, sleiider, straight, or variously curved. Cup 

 deep and sometimes vertically striated on the inside, with from sixty 



