56 CONTRIBUTIONS TO CANADIAN PALiEONTOLOGY. 



acters. la the writer's opinion he does not prove conclusively that the 

 fossils described by Billings are referable to M. umbellifera, in fact the 

 inner structure of the types of A. cornuta leads to quite a contrary 

 conclusion. 



Devonian. — Abundant in the Corniferous limestone of Ontario. Also 

 Long Portage, Missinaibi River to Moose Factory (Corniferous), R. 

 Bell, 1877.* 



Syringopoea peeelegans, Billings. 



Plate II., fig. 4. 



Syringopora eleyans, Billings. 1858. Rep. of Progress for 1857, Geol. Survey of Canada, 



p. 172. 

 Syringopora perelegcms, Billings. 1857. Canadian Journal, new series, vol. IV., p. 117, 

 fig. 19. 



Billings. 1863. Geology of Canada, p. 366, fig. 368. 

 „ II Nicholson. 1874. Palaeon. of Ont., p. 41. 



„ ,1 Rominger. 1876. Geol. Sur. of Mich., Foss. Corals, p. 81, pi. 



XXXI., part of fig. 2 and fig. 4.\ 



" Corallites one line in diameter, sometimes a little more or less, dis- 

 tant a little less than one line, connecting tubes half a line in diameter, 

 and distant from one line to one line and a half, usually projecting at 

 right angles, but sometimes a little oblique. Epitheca with numerous 

 annulations, generally indistinct, but under certain circumstances of 

 growth sharply defined and deep, so much so as to give to the corallites 

 the appearance of the jointed stalk of a crinoid. The young individuals 

 are produced by lateral budding, and in one specimen examined the whole 

 colony appears to be based upon a broaxl lamellar foot secretion like that 

 which forms the base of a Favosite. 



" The distance of the corallites is usually about a line, but like all the 

 other species, this one varies a good deal in this respect. When some 

 cause has intervened to prevent their regular growth they are much 

 flexed, and consequently at times more distant than when they have been 

 undisturbed. The connecting tubes on the same side of the corallite are 

 three or four lines distant, but generally on the other sides one or two 

 others in the same space occur, making the average distance one line or 

 one line and a half." (Billings.) 



* Geol. Survey of Canada, Rep. of Progress for 1877-78, p. 5c, Provisional list of 

 fossils collected between the Long Portage of the Missinaibi branch of the Moose River 

 and Moose Factory, by Mr. Whiteaves, in Dr. Bell's Report on the east coast of Hud- 

 son's Bay. 



tlig. 3, pi. XXXI., evidently represents a specimen of S. Maclurei, Bill. 



