426 Silurian and Devonian Fossils of Canada. 



Formation and Locality. — Devonian. Corniferous limestone, 

 near Woodstock Canada West. 

 Collector. — A. Murray. 



Syrixgopora Hisixgeri (Billings). 



Description. — This species forms large masses of very long, 

 nearly parallel or slightly varying, slender corallites, which are 

 closely aggregated and present a rugged or knobby appearance 

 from the great number of the connecting tubes. The diameter of 

 the corallites is one-third of a line, or a little more. The tubes 

 of connection are distant from two-thirds of a line to one line and 

 a-half. The distance between the corallites is for the greater part 

 less than their diameter. The young corallites branch from the 

 gides of the adult individuals, and immediately become parallel 

 with the parent, and connected with it again by the usual tubes 

 of connection. 



Formation and. Locality. — Devonian. Corniferous limestone, 

 Canada West, (common.) 



Collectors. — A. Murray and E. Billings. 



Affinities of S. Hisingeri. — Edwards and Haime have describ- 

 ed two species from Ohio, collected in rocks of the age of the 

 Onondaga and Corniferous limestones, which appear to be closely 

 allied to this ; the following are their descriptions : 



" Syrixgopora Yerxeuilli. — Corallites long, distance be- 

 twen them twice or thrice their diameter, subfiexuous and angular 

 at the points of the origin of the tubes of connection, these are 

 distant two or three millimetres ; diameter of the corallites two- 

 thirds of a millimetre." — Devonian, Columbus, Ohio. (Polypiers 

 Fossiles, p. 289). 



• " Syrixgopora Cleyiaxa. — Corallites slightly fiexuous, dis- 

 tant once or twice their diameter, which is two-thirds, of a milli- 

 metre." — Devonian, Carolton and Dayton, Ohio. (Polypiers 

 Fossiles, p. 295.) 



The first of these species is different from S. Hisingeri in the 

 greater distance of the corallites. The description of the second 

 is too incomplete to enable us to decide whether it refers to the 

 same species or not. The authors state that their specimen was 

 imperfect, and that they were not certain that it had not been 

 previously described. 



Genus Michelixia (De Koninck). 

 Generic characters. — " Corallum compound, forming rounded, 



