WHITEAVES. J DEVONIAN FOSSILS OP MANITOBA, ETC. 275 



The whole of the Stromatoporoids collected by Messrs. Tyrrell and 

 Bowling in 1888 and 1889, from the Devonian rocks of Lakes Manitoba 

 and Winnipogosis, were sent (in January, 1890) to Prof. H. A. Nicholson, 

 who has since reported on them in a paper published in the " Annals and 

 Magazine of Natural History" (London, England) for April, 1891. Ac- 

 cording to Prof. Nicholson, on page 313 of this paper, these two specimens 

 in particular " have the general aspect of StronuUopora Biicheliensis, Barg., 

 sp., and are probably referable to this species. Unfortunately, the speci- 

 mens in question are dolomitized, a,nd their internal structure is so far 

 altered that this reference cannot be regarded as free from doubt.'' 



Stromatopora. Sp. 

 (Cfr. Stromatopora Hilpschii, Bargatzky, sp.) 



Caunopora Hiip^chii, Bargatzky. 1881. Die Stromatoporen desRlieinischen Devons, 

 p. 61. 



Stromatopora Hiipschii, Nicholson. 1886. Mon. Brit. Stromatoporoids, Pt. I, p. 50, 

 figs. 6 a, b, and pi. x., figs. 8 and 9 ; also lb., Pt. III. (1891), 

 p. 176 (which see for a complete list of the synonyms of this 

 species, with references), pi. xxii., figs. 3-7. 



Lake Winnipegosis, at the south end of Snake Island (one specimen), 

 and on a small island on the south-east side of Dawson Bay (one speci- 

 men) ; J. B. Tyrrell, 1889. 



In reference to these two specimens Dr. Nicholson writes (op. cit., p. 

 314) that they "belong to a species of Stromatopora in many respects 

 similar to ^S*. Hiipschii, Barg. Structurally these specimens agree with 

 the latter common European and British type, and differ from S. Biiche- 

 liensis, Barg., in their coarse skeleton-fibre, the lax reticulation of the 

 skeleton, and the loose spreading form of the astrorhizte. The internal 

 structure of these specimens is, however, very poorly preserved, and it 

 would be rash to refer them unreservedly to <S'. Hupschii." 



A single specimen of a Stromatoporoid collected by Dr. R. Bell in 1877, 

 at the Long Portage of the Missinaibi River, is also doubtfully referred 

 by Prof. Nicholson to ,S'. Iliipsehii. 



(S.) AcTiNOSTROMA EXPANSUxM, Hall and Whitfield. (Sp.) 



Stromatopora expansa, Hall and Whitfield. 1873. Twenty-third Reg. Rep. N. York 

 St. Cab. iSlat. Hist., p. 226, pi. ix., fig 9. 



Actinoxtroma expansum, Nicholson. 1891. Ann. and Mag. Nat. Hist. vol. VII., 

 sixth series, p. 316, pi. a, figs. 1 and 2. 



Lake Winnipegosis, at a small island on the south-east side of Dawson 

 Bay, J. B. Tyrrell, 1889 : two specimens. 



