. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. 29 Tlin septa nsunlly more Arched septal ippp.'ir ti) be 0111 tlie parent icirelinp- stria' 7 its cloiif^ated is the species ras T haveob- vertieally side arentcorallite, iwn to increase and is solitary rs not to have tiy cylindrical Jiar^'o ipdi- :er of an inch if'crous Lime- p. 124. r to one hun- centi'i! of the Q a quarter of to seven short ges of fjrowth. ' on the siiles //. Kriciisr is f uf) to nearly 0 three inches 1 on one side, le ; and Port V. p. 126. cted tojjether g septa about expan
. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. 29 Tlin septa nsunlly more Arched septal ippp.'ir ti) be 0111 tlie parent icirelinp- stria' 7 its cloiif^ated is the species ras T haveob- vertieally side arentcorallite, iwn to increase and is solitary rs not to have tiy cylindrical Jiar^'o ipdi- :er of an inch if'crous Lime- p. 124. r to one hun- centi'i! of the Q a quarter of to seven short ges of fjrowth. ' on the siiles //. Kriciisr is f uf) to nearly 0 three inches 1 on one side, le ; and Port V. p. 126. cted tojjether g septa about expanded cup iiiatnreand of oii!;ht arched iiinnte sfiines. les constitute the centre of st the typical Ia3 unusually ' rate, do not the periodic ' the lonufitu- n,i;s, //. colli- Jolborne, and 23. Heliopiiyllum exiouum (Billings). fleliophyUum exigHiun{Bi\\mg>i), Canadian Jour. New Series, Vol. V. p. 2G1. Figs. 9 [& 10. " Small, turbinate, more or less curved, often flattened on the side of the curva- ture : radiating septa between and eighty ; about six obscure arched striae to one line on their flat sides, and the same number of spines on their edges. The depth of the cup is equal to one fourth or one third of the whole length of the coral. In small specimens, the martrin of the cup is thin and sharp ; but in large ones rounded, and one line or a little more in width. About one half of the radiating septa reach the centre, and fcirm a small munded elevation on the bottom of the cup. There is a septal fossetto on one side, which, in all the spociiiiens I have seen, reaches the centre. The surface exhil)its a few sharp constrictions of growth, with rounded annulations between them, the latter often abruptly terminated on their utiper sides. In very perfict specimens, fine eneirelinir stria? of variable >\zi}., appartiiitly from ei"-ht to tifteen in the width of one line. The horizontal strite. svhijli indicate tiie number of septa, are distinctly
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