14:0 NOTES ON THE FOSSILS OP ONTARIO. 



5. Stromatopora Hindei, Nicholson. (^Ref. Annals and Maga- 

 :zine of Katural History, Jan., 1874.) The Clinton beds of Owen 



Sound yield examples of a Stromatopora which show no internal 

 structure, but which exhibit large rounded oscula, and which thus 

 appear to be referable to the above species, originally described from 

 the Niagara Limestone of the same district. 



6. Zaiohrentis Stokesi, Edw. and Haime. {Ref. Polypiers Foss. 

 des Terr. Pal. pi. iii. fig. 9.) Common in the Clinton Group at Owen 

 Sound. Also, or a nearly allied but smaller form, at Dundas. 



7. Favosites, sp. — A small hemispheric mass, with remarkably 

 round thick-walled tubes, which are of nearly equal size throughout, 

 : and have a diameter of about two-thirds of a line. Tabulae flat and 

 ^tolerably remote. Allied to F. Gothlandica, Lam., but apparently 

 • distinct. 



Locality and Formation. — ^Clinton Group, Owen Sound. 



8. Heliolites, sp. — Closely allied to and probably identical with 

 H. interstincta, Wahl., but too much metamorphosed to permit of 

 ■specific determination. 



Locality and Formation. — Clinton Group, Owen Sound. 



9. Ch^etetes lycoperdon. Say. (_Ref. Hall, Pal. N.Y., Vol. I., 

 pL xxiii., fig. 2 and pi. xxiv. fig. \g, also Pal. N.Y., Yol. II., 

 pi. xvii. figs. \g-\Ic.) The massive and convex examples of 

 Ghcetctes which Hall places under G. lycoperdon, and which are now 

 generally regarded as belonging to G. petropolitamis, Pander, have 

 not come under our notice as occurring in the Clinton Group, though 

 recorded in this position by Hall. On the other hand, the ramose 

 examples which would appear properly to constitute G. lycoperdon, 

 and which are probably identical with Ghoitetes Fletcheri, Edw. and 

 H., are far from uncommon. They consist of cylindrical or sub- 

 cylindrical branching or sub-palmate coralla, composed of numerous 

 cylindrical or prismatic corallites which radiate obliquely from an 

 imaginary central axis, and open on the surface by polygonal, oval, 

 or circular calices. The walls of the corallites are thin, and there 

 are about eight calices in the space of one line. The calices are for 

 the most part of equal size, and there are no elevations or " mame- 

 lons " occupied by corallites of larger size than the average. The 

 diameter of the branches varies from one to three lines. 



Locality and Formation. — Clinton Group, Dundas. 



