146 NOTES ON THE FOSSILS OF ONTARIO. 



37. Stromatopora Hindei, JSTicliolsoii. {Ref. Annals of Natural 

 History, Jan., 1874.) Owen Soimd. 



38. Halysites catenularia, Linnseus. — The Niagara Limestone 

 yields this species in great abundance. Different examples vary 

 immensely both as regards the size of the meshes of the network, 

 and still more as to the size of the individual corallites. Thus, 

 examples occur, on the one hand, in which the long diameter of the 

 corallites is no more than one-third of a line, whilst others, on the 

 other hand, have a long diameter of one line and three quarters, or 

 more than five times as great. Nevertheless, too many intermediate 

 forms occur to allow us to suppose these to be other than varieties of 

 a single species. The examples here included under the above name 

 comprise both H. catenularia and H. escharoides, as characterized by 

 Milne Edwards and Haime. 



Locality and Formation. — -Owen Sound and Rockwood. Niagara 

 Limestone. 



39. Halysites agglomerata. Hall. {Ref. Catenipora agglomerata, 

 Hall, Pal. N.Y., Vol. II., pi. xxxv., figs. 2a-g.) This form appears 

 to us to be rightly separated from IT. catemdaria, with which it is 

 united by Edwards and Haime. It is distinguished chiefly by the 

 general form of the corallum, and by the fact that adjoining corallites 

 are separated by transversely- septate interspaces. 



Locality/ and Formation. — Niagara Limestone, Rockwood. 



40. Heliolites interstincta, Wahlenberg. (Ref. Ileliolites 

 pyriformis? Pal. N.Y., Vol. II., pi. xxxvi. A. figs, la-^%.) Owen 

 Sound, 



41. Favosites Gothlandica, Lamarck. {F. Niagarensis, Hall. 

 Pal. N.Y., Vol. II., pi. xxxiv. A. figs. 4:ar-i.) Specimens undistin- 

 guishable from this species are not uncommon in the Niagara 

 Limestone, though not so abundant as F. venusta. The corallites 

 usually average one line in diameter, though there are always 

 smaller ones intercalated amongst the larger; and the septa are 

 commonly represented by spiniform projections. 



In the Niagara Limestone of Owen Sound occu.r specimens which 

 attain much larger dimensions than is ordinarily the case with. 

 F. Gothlandica. In these examples, the corallites are hexagonal, . 

 with a normal diameter of from two and a-half to three lines, and in 

 some instances with a long diameter of from four to five lines ; the 



