151 



Hudson River formation- of Anticosti and Ontario. The chief pecuUari- 

 ties of this variety, Mr. Lambe thinks, are "the marked regularity of 

 the corallites, their sides being flattened, — and the absence of the tubules 

 between them." 



It is most probably a -specimen of this variety of H. catenularia that 

 was collected on the west shore of Lake Winnipeg, north of the Saskat- 

 chewan, by Captain Back in 1833, and referred to in Dr. Fitton's Ap- 

 pendix No. 4 to Back's Narrative of the Arctic Land Experlition to the 

 mouth of the Great Fish River," &c., as "doubtless a Catenipora or 

 chain coral."* 



More recently specimens of this coral have been collected by members 

 of the staff of the Geological Survey of Canada at the following locaHties: 

 In the Red River valley, at Lower Fort Garry, by T. C. Weston in 1884, 

 and at East Selkirk by T. C. Weston in 1884 and by L. M. Lambe in 

 1890. In or around Lake Winnipeg, at Dog Head and Big Grindstone 

 Point, by T. C. Weston in 1884; at Little Black Island by J. B. Tyrrell 

 in 1889, and D. B. Dowling and L. M. Lambe in 1890; at Black Bear 

 and Jack Head islands by D. B. Dowling and L M. Lambe in 1890; at 

 Little Tamarack and Commissioners (Cranberry) islands, and one mile 

 west of Bull Head by D. B. Dowling in 1890; and at Cat Head by D. B. 

 Dowling in 1891. 



Tetradium fibratum, Saffbrd. 



Tetradium fihratum, Satford 1856. Am. Journ. Sc. and Arts, ser. 2, vol. 



XXII., p. 237. 



,1 11 Billings 1863. Geol. Canada., p. 139, figs. 71, a-b. 



S. A. Miller 1889. N. Am. Geol. & Palaeont., p. 206, 



figs. 224 and 225. 



In the Redpath Museum at Montreal, until quite recently, there were 

 two specimens of this species, but which are probably portions of the same 

 corallum, labelled as having been collected at East Selkirk by Professor 

 J. H. Panton. Through the kindness of Sir J. W. Dawson, one of these 

 specimens has since been presented to the Museum of the Survey. 



ZOANTHARIA. 



COLUMNARIA ALVEOLATA, GoldfuSS. 



Columnaria alveolata, GoMluss 1826. Petref. Germ., vol. I., p. 72, pi. 24, 



figs. 7, a-c. 

 Goiumnaria multiradiata, Castleneau 1843. Sil. Syst. de I'Amer. Septentr. , p. 



44, pi. 19, fig. 1. 



* The typical form of the chain coral had previously been collected (probably for the 

 first time in North America) at Drummond Island, Lake Huron, by Dr. J. J. Bigsby in 

 1819 or 1820, and the fact is recorded on page 204 of the first volume of the second series 

 of the Transactions of the Geological Society of London, published in 1824. 



