72 TABULATE CORALS. 



very large size, all the tubes exhibit the characteristic incom- 

 plete and inosculating tabulee of this species. 



Formation and Locality. — Common in the Corniferous Lime- 

 stone (Devonian) of Rama's Farm, Port Colborne, and other 

 localities in the same formation in Ontario. The species 

 occurs at many points in the United States, where the 

 Corniferous Limestone is exposed ; and it is quoted by 

 Milne-Edwards and Haime from the Upper Silurian of the 

 same area. 



Favosites Bowerbanki, Milne-Edwards and Haime, sp. 

 (PI. III. figs. 4-4-^.) 



Favosites spongites (pars), Lonsdale, in Murchison's Silurian System, p. 603, PI. 



XV., bis, figs. 2> c-Z e (cset. exclusis), 1839. 

 Chatetes (?) Bowerbanki, Milne-Edwards and Haime, Pol. Foss. des Terr. Pal., 



p. 272, 1851. 

 Montictdipora (?) Bowerbanki, Milne-Edwards and Haime, Brit. Foss. Cor., p. 



268, PL LXin., figs. I - 1 ^, 1854. 



Spec. Char. — Corallum exceedingly variable in form and size, 

 but generally in the shape of thick lobate and branched masses. 

 Corallites irregularly polygonal in shape, mostly about one-fif- 

 tieth of an inch in diameter, but sometimes less or more ; the 

 walls thin, and perforated by irregularly-distributed mural pores, 

 which vary in number in different examples, and may be uni- 

 serial, biserial, or triserial. Calices irregularly polygonal, occa- 

 sionally diamond-shaped in parts of the corallum, often divided 

 by incomplete vertical partitions arising from both sides of the 

 wall, and indicating unfinished fission of the tube. Septa en- 

 tirely obsolete. Tabulse very few in number, usually curved, 

 remote, from three-quarters of a line to a line apart. 



Obs. — I have not thought it necessary to figure a specimen 

 of this species, as it has been very well illustrated by Milne- 

 Edwards and Haime (Brit. Foss. Cor., PI. LXIIL) The 

 principal figure given by these authors is, however, that of 

 a quite exceptionally complex and dendroid example of this 

 form. So far as I have seen, the corallum is generally in the 



