NOTES ON THE FOSSILS OF ONTARIO. 149 



The characters of the species are as follows : — Coralhim ramose, 

 the branches cylindrical, nearly a line and a half in diameter, divid- 

 ing dichotomously at intervals of three lines and upwards, sometimes 

 inosculating. Coi-allites oblique to the axis of the branches, mode- 

 rately thick-walled, in contact with one another. Calices circular or 

 polygonal, sometimes wider than long, from four to five in the space 

 of a line measured vertically or diagonally, the lower lip of the 

 aperture slightly or not at all prominent. For the most part the 

 calices are of the same size, but sometimes smaller ones are inter- 

 calated amongst the others. 



The species is distinguished from the more slender forms of 

 Favosites dubia, De Blain., and F. reticulata, De Blain., by the much 

 greater closeness of the calices and the comparatively thin walls of 

 the corallites. In other resj)ects no difference can be pointed out 

 between our Niagara examples and specimens of the last mentioned 

 forms from the Corniferous Limestone. From Chcetetes the species is 

 separated by the thicker walls of the corallites and the form and 

 aspect of the calices. 



Milne Edwards and Haime identify Gladopora multijoora, Hall, 

 with Alveolites (?) seriato2yoroides, Edw. and H., which is certainly 

 not an Alveolites, and which is distinguished by its abundant ccenen- 

 chyma, its vertical corallites, and the arrangement of the calices in 

 nearly vertical rows. We cannot, however, accept this identification, 

 since our examples, as well as those figured and described by Hall, 

 have no true coenenchyma, have corallites with a slight but well 

 marked obliquity, and have not got the cells arranged in vertical 

 roAvs, but rather in obliquely transverse rows. 



Locality and Formation. — Niagara Limestone, ilockwood and 

 Thorold. 



45. Favosites ("?) seriata, Hall. {Ref. Gladopora seriata. Hall, 

 Pal. N.Y., Vol. II., pi. xxxviii., figs, la— m.) Two or three speci- 

 mens in our collections have the mode of growth of this species, but 

 in other respects differ little or not at all from the preceding. It is 

 perhaps doubtful, indeed, if the distinctions between Cladopora mul- 

 tipora, G. seriata, G. coisjntosa, G. cervicornis, and G. macrophora, 

 Hall, are of specific value ; but as we have not access to authentic 

 specimens, and as Hall only in the case of the first of these gives 

 any measurements, we are unable to decide this pomt. 



