Prof. H. A. Nicholson — Neio Devonian Fossils. 197 



present position by floating-ice. 3. The contained marine shells 

 have been brought along with the gravel. 4. Therefore the animals 

 to which the shells belonged lived and died somewhere else, towards 

 the northwest, and that very possibly before the time when the sea 

 was deep enough to deposit the elevated gravels. 5. The shells, as a 

 group, if we may venture to judge from so small a collection, point 

 to rather more boreal marine conditions than now obtain in this 

 region ; although they are all to be found now inhabiting the neigh- 

 bourina: seas. 



II. — Descriptions of New Fossils from the Devonian Foemation 



OF Canada. 



By H. Alleyne Nicholson, M.D., D.Sc, F.R.S.E. ; 



Professor of Natural History in University College, Toronto. 



{Concluded from page 163.) 



(PLATE IX.) 



Fenestella magnifica, Nicholson, PI. IX. Fig. 22. 



Polyzoary forming a flattened expansion of unknown but ap- 

 parently considerable size. Branches almost perfectly straight, 

 bifurcating at intervals of from one quarter of an inch to one inch, 

 nearly parallel, united by straight transverse dissepiments, sub- 

 angular or obtusely carinated, and closely striated on the non- 

 celluliferous side. About four branches in the space of three lines, 

 measured across the frond. Dissepiments about equalling the 

 branches in diameter, usually placed at intervals of from one line 

 to one-tenth of an inch apart. Fenestrules oblong, rectangular, 

 nearly equal, from one line to one-tenth of an inch in length by 

 two-thirds of a line in width ; nine fenestrules in one inch measured 

 vertically, twelve in the same space measured diagonally. The 

 fenestrules of contiguous rows nearly, but not quite, at the same 

 level. Celluliferous face unknown. 



This species (Fig. 22) is most nearly allied to Fenestella laxa, 

 Phillips, from the Carboniferous and Devonian Eocks of Britain; 

 but it is readily distinguished by the regular dimensions of the 

 fenestrules, their rectangular shape, and their much smaller size. 

 (The fenestrules in F. laxa are from two to four times as large 

 as those of F. magnifica.) From Folypora (Gorgonia) ripisteria, 

 Goldfuss, the present species is separated by its rectangular, not 

 oval, fenestrules, the much greater proportionate and absolute width 

 of the fenestrules, and the straight, not flexuous, branches. 



I have only seen a single specimen of F. magnifica, and that only 

 exhibits the reverse side of the coencecium ; but the general charac- 

 ters of the frond are so distinctive, that I have no hesitation in 

 founding a distinct species for its reception. 



Locality and Formation. — Corniferous Limestone, Port Colborne. 



Fenestella maeginalis, Nicholson, PL IX. Fig. 23. 



Polyzoary forming a fan-shaped expansion, of unknown dimen- 

 sions. Branches straight, nearly parallel, about four in the space 



