"MBE ] CANADIAN PALEOZOIC CORALS. 37 



The branches or stems are generally found in a fragmentary condition, 

 in pieces an inch or two in length. An examination of the type and 

 other specimens in the collection of the Geological Survey tends to show 

 that the only diflference between this species and G, Fischeri, Billings, is 

 found in the shape of the corallum, which in the former is ramose with 

 cylindrical or subpalmate branches, and in the latter irregularly palmate 

 or flabellate. 



What has already been said about the general structure of G. Fischeri, 

 as regards the form and size of the corallites and calyces, the disposition 

 of the mural pores and other details, applies equally to G. Ecemeri, the 

 only differences being those incidental to the change in the form of the 

 corallum. Although in the latter species the cylindrical stems become 

 at times subpalmate, no specimens of either species have apparently been 

 seen that would justify the opinion that the two forms passed the one 

 into the other ; in the meantime therefore the writer is inclined to regard 

 G. Scemeri as worthy of specific distinction. 



Found in the Hamilton formation of Ontario, and recognized by Mr. 

 Whiteaves in a specimen collected by R. G. McConnell, in 1875, from 

 ■ the upper Devonian of the Peace River, in the district of Athabasca. 



Genus Michblinia, De Koninck. 1842. 



(An. foss. des terr. Carb. de la Belgique, p. 29.) 



Corallum in lenticular, hemispherical or subcylindrical masses, attached 

 by the centre of the base and provided with an epitheca ; corallites thin 

 walled, in contact or contiguous only at intervals, polygonal when 

 touching, circular when apart, unequal in size, often large, their inner 

 surfaces longitudinally striated by numerous impressed lines with septal 

 spines on the interspaces ; mural pores irregularly distributed or in 

 vertical rows, also, when the corallites are in contact only at intervals, in 

 single or double horizontal rows ; tabulse convex or flat, with small 

 secondary tabulse or cysts. 



Michblinia convexa, d'Orbigny. 



Michelinia convexa, d'Orbigny. 1850. Prodr. de Paleont., t. I. p. 107. 



„ „ Milne- Edwards and Haime. 1851. Polyp. Foss. des Terr. Palseoz., 



p. 251, pi. 16, fig. 1. 

 I, II Billings. 1859. Canadian Journal, new series, vol. IV., p. 112, fig. 13. 



„ ,1 Nicholson, 1874. Palaeon. of Ontario, p. 63. 



II ,1 Rominger. 1876. Geol. Sur. Mich., Poss. Corals, p. 72, pi. 



XXVI., figs. 1 and 2. 



