2riS CONTRIBUTKINS To CANADIAN PAL.EONTOLOC I Y. 



posuies in or around Lake ^lanit(.)ba in cninpany with Air. Tyrrell. The 

 collections of fossils which Mr. Tyrrell ohtained from the Devonian rocks 

 of the neighhourhood of these two lakes on the occasions referred to, and 

 which will form the subject of the present i-ejiort, are anions; the largest 

 and most imi)ortant that have bi^en brought back by any of the iSurvey 

 explorers for many years. The species represmrted iu these collections 

 are of unusual intei'cst, not only on account cjf the number of new forms 

 among them, but also as showing the close relations that exist, iir s(.i many 

 respects, between the fauna of these rocks and that of the Devonian rorks 

 of Europe. As scweral of the localities mentioned in this rejMjrt are not 

 to be found in any of the older maps, it may be mentioned that they are 

 all laid down on the " (_lc(j|ogical Map of N(ji-th-westerii Manit<jba and 

 portions of the districts of Assiniboia and Saskatchewan," rficently pub- 

 lished by this Survey, and hei-e referred to as Mr. Tyrrell's map. 



The whole of the spei.ues enumerated or described in this paper aj)pear 

 to be from the Jliddle or Upper Devonian, in the sense in which these 

 terms ha^•(; been recently used by Kayser, Tschernyschew and otlu'i- Euni- 

 pean wiiters. By far the larger number are frcjm the iStringocephalus 

 zone, and, in order to avoid repetition, a capital s (S) will be ])i-eiixed 

 to tlie names of ea.ch of these. jVccording to Mr. Tyri-ell, tlu^ rocks 

 which are here called Middle Devonian, consist (jf "a sei-ies of (hjlomiti's 

 which extend upward from the basal beds at I)evils Point, Lake Winni- 

 pegosis, to tin; upper beds exposed on the islands and shoi'es of Dawson 

 Bay, in which Si ri ikjih-i'iiIhiI nn is particulai'ly abundant-. The U|ii)er 

 Devonian of this district consists of -a series of mca-e or less impure liuie- 

 stoncis, extending from the lowest beds at Onion I'oint, Lak(! Manitoba; 

 iSnake Island, Lake Winnipegosis, and «, Uwv other localities, thi'ough the 

 light grey shales" (of the Cuboides zoiuM " on the Led Deei- LivcT, &a:. 

 to the light pinkish liiriestojies at Point Wilkins." 



In the preparation of this paper the writer is indebti'd to Mr. Tj. M. 

 Lamlje, F.G.S., of this .Survey, for valuable assistance in ascertaining the 

 exact charactei- of many of the species, ('S|)ccia]ly the internal structures 

 of the (-(jrals and the minute generic and spei.-ilic featur-es of the Polyzoa ; 

 to r)r. Fritz Freeh, (jf Halle, (Germany, who paid a short \isit to Ottawa 

 in (Jetober last, for critical suggestions in regard to the affinities of the 

 Cyathophyllida-,; and to Mr. E. 0. XJIiich, of Newpoi-t, Kentucky, for 

 notes on the .specific relations of some of thi^ I'olyzoa. 



The classiheation followed, as i]i previous |)a,'ts of this xcjlume is 

 mainly that adojjted by Dr. Karl Zittel in his " llandbuch dcr P:da'onto- 

 logie," but the eorals are ari'anged in c(jnfornuty with Dr. !'^n;ch's memoir 

 on the Gyathophyllidieand Zaphrentidieof theOerman Aliddle I le\(inian* 



* Paliidontol. Abliandl. heraiisgcg., von W. Dames & I-;. Kayser. Berlin l.SSi; Vol 



III r't. :i. . , -. . 



