WHiTEAVEs] DEVONIAN FOSSILS OF MANITOBA, ETC. 267 



in the " Polypiers Fossiles des Terrains Pala?ozoiques, " published in is.")!. 

 Morris, in the second edition of his " Catalogue of British Fossils" (1854), 

 Lindstroni, in his " Index to the genera uf Paheozoic Corals " (Stockholm, 

 1883), and Etheridge, in the first volume of his " Fossils of the Britisli 

 Islands " (1888), also make Styhistra'd, Lonsdale, a synonym of Lilliostni- 

 tion, though Zittel, in the first volume of his " Handbuch der Pahvonto- 

 logie (187G-80), regards it as a synonym of Dlj>]iyj>]iylhi^in, but uses the 

 naxae Sty!astro'(i, Fromentel, for a Lia^sic genus of corals belonging to the 



Although they agree perfectly with Professor Whitfield's description 

 and figures of the coral from the Devonian rocks of Ohicj which he calls 

 Styl((s/rir(i A ana, it yet seems to the writer that the specimens collected by 

 Di-. Bell and Ml-. Tyrrell are referable to Ci/dthoji/ii/llinn rather than to 

 Stylastrrm, and that they are very nearly related to the C. rntjosiiiii of 

 Hall. From the last named species they seem to dififer only in the cii- 

 cumstance that their septa only reach about half way to the centre and 

 that they are not continued, as carinations, ou the upper surface of the 

 tabuhe. 



(S.) Cyathophyllum peofundum, Hall. (Sp.) 



Artrrnlnria profunda. Hall. 18.58. Rep. (-(eol. iSurv. Iowa, vol. I, pt. 2, p. 477, pi. i, 

 tigs. 7a b, 0. 



"Western slmre of Dawson Bay, from slabs apparently derived from 

 the neighbouring cliffs," J. W. Spencer, 1874 : two or three specimens in 

 which the internal structure of the corallites is beautifully preserved. 

 These were identified with the present species by E. Billings, on page 68 of 

 the Keport of Progress of this Survey for 1874-75. 



Since then, precisely similar specimens have been collected " in place " by 

 J. B. Tyrrell, at Lake Manitoba, on the east side of the Narrows, in 1888, 

 and by Messrs. Tyrrell and Dowling, at Lake AX'innipegosis, on three 

 islands in the southern part of Dawson Bay, and on the Red Deer River at 

 the Lower Salt Spring, in 1889. In each of these, the a\-erage maximum 

 diameter of the adult corallites is from thirteen to fifteen millimetres, and 

 the number of their septa from thirty eight to forty.* Some of the septa 

 extend to the centre and others not quite so far, Ijut these latter are of 

 vai7ing length and do not regularly alternate with tlie former. There 

 are no tabula-, the spaces between the septa being filled with vesicular 

 tissue, the general direction of the vesicles being upward and outward. 



According to Dr. Rominger, t "the corals described under the name 



" Prof. Hall says that there are from forty one to forty si.x septa in full grown indivi- 

 duals of his Accriulariii profunda. 



t Geol. Surv. Michigan, Fossil Corals, p. 10(j. 



