umbe] CANADIAN PALEOZOIC CORALS. 159 



DiPHYPHYLLUM MULTICAULE, Hall. (Sp.) 



Plate XIII., figs. 4, 4a, 4b, 4c. 



Syringopora ? mvUicauKs, Hall. 1852. PaliEon. New York, vol. II, p. 119, pi. 33, figs. 3a-g. 

 Eridophyllum Vennori, Billings, 1865. Canadian Naturalist, new series, vol. II., p. 431. 

 Diphyphyllum multicaule, Rominger. 1876. Gael. Sur. Mich., Poss. Corals, p. 121, pi. 



45., figs. 3 and 4. 

 M „ Lambe. 1899. Ottawa Naturalist, vol. XII., p. 241. 



" Corallum composed of upright, subparallel, cylindrical corallites, from 

 about 2*5 to 5 mm., in thickness, that increase by lateral budding and 

 form colonies sometimes over 12 cent, high and exceeding 10 cent, across. 

 Corallites slender, flexuous, separated from each other by spaces equal to 

 or less than their own diameters, connected at irregular and frequent 

 intervals by horizontal aoanthiform outgrowths or lateral spurs that are 

 to all appearances not solid but show traces of vesicular structure within. 

 Septa numbering from about thirty-two to thirty-eight in average sized 

 corallites, alternately long and short, the longer passing to the centre, 

 the shorter reaching about half way. Curved dissepiments in the outer 

 part of the interseptal spaces in a single or sometimes apparently in a 

 double series. Tabulae close-set, about twenty in a space of 5 mm., de- 

 flected downward at their margins, difficult to make out in the silicified 

 specimens examined. Epitheca well developed, showing faint annular 

 markings and longitudinal septal lines. 



" The corallites of this species are more slender than those of the pre- 

 ceding, and the septa are less numerous". (Lambe, 1899.) 



Localities. — Grand Manitoulin Island, Lake Huron, Alexander Murray, 

 1847 ; half a mile north-west of Portage Bay, Lake Manitou, Grand 

 Manitoulin Island, R. Bell and H. G. Vennor, 1865 (type of Eridophyl- 

 lum Vennori, Clinton formation) ; Fossil Hill, Grand Manitoulin Island, 

 J. Townsend, 1883 ; one and a half mile south-east of South Bay, Grand 

 Manitoulin Island, R. Bell, 1891. Niagara group. 



DiPHYPHYLLUM Verneuilanum, Milne-Edwards and Haime. (Sp.) 

 Plate XIII., figs. 5, 5a, 56. 



Eridophyllum VemeuUanvm, Milne-Edwards and Haime. 1851. Polyp. Foss. des. Terr. 



PalfEOz., p. 424, pi. 8., figs. 6, 6o. 

 „ „ Billings. 1859. Canadian Journal, new series, vol. IV., p. 



131, fig. 26. 

 „ Nicholson. 1874. Palseon, ofOnt., p. 35, figs. 7a, 6, c. 



„ „ Nicholson. 1875. Geol. Surv. of Ohio, part II., p. 239. 



Corallum composed of an aggregation of large, upright, flexuous, often 

 much geniculated corallites, that increase by lateral gemmation and are 



