3H 



ZOANTHARIA. 



they may be " incomplete." In no instance are the tabulae " cys- 

 toid " — that is to say, they do not anastomose so as to give rise to a 

 vesicular tissue of arched cells. The septa in Favosites are some- 

 times wanting, but are usually represented by vertical rows of 

 pointed tubercles or of slender calcareous spines. As previously 

 mentioned, the tabulae in some species of Favosites are "incom- 







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59 



Fig. 195. — A, A specimen of Favosites Gothlandica, Lam., from the Niagara Limestone (Wen- 

 lock) of Owen Sound, Ontario, of the natural size ; B, A small example of the same species from 

 the Wenlock Limestone of Dudley, with comparatively minute corallites, of the natural size ; c, 

 Fragment of the same species, with large-sized corallites, from the Wenlock Limestone of Got- 

 land, of the natural size ; D, Part of two corallites of the same species, from the Corniferous 

 Limestone (Devonian) of Woodstock, Ontario, slightly enlarged. (Original.) 



plete," having the form, some or all of them, of thin, close-set trans- 

 verse plates which only extend across about one-third or one-half 

 of the diameter of the visceral chamber. This condition of the 

 tabulae is characteristic of such forms as the Devonian F henii- 

 spherica (fig. 196), and the generic name of Emmonsia has been 

 proposed for these. 



Nearly allied to Favosites is the genus Pachypora, in which the 



