DEVONIAN ROCKS OF CANADA WEST. 105 



a portion are represented, some of tliem with, the septal spines fully 

 developed, and extending nearly to the centre. If we are to adopt 

 the several generic and specific names proposed for IS'. Qothlandica, 

 the tubes with the radiating spines would belong to the genus Astro- 

 cerium of Hall, those with incomplete diaphragms to the genus Em- 

 monsia of Edwards and Haime ; the others with complete diaphragms 

 would be referred to Favosifes. We thus have all the characters of 

 three genera in the same specimen. 'Fig. 4 represents part of a 

 specimen in which the diaphragms are deeply indented in several 

 places around the margin. This character has been relied upon as 

 of specific importance, but as in this specimen there are numerous 

 diaphragms perfectly flat, I do not think it belongs to a diflerent 

 species. 



Locality and formation. — F. Qothlandica occurs abundantly in al- 

 most every large exposure of the corniferous limestone in Canada 

 West. Fine specimens may be procured at the large quarry belong- 

 ing to Mr. Savage, lot 6, con. 1, Wainfleet. 



Fatosites hemispheeica. — (Tandell and Shumard.) 



Favosites Alveolabis. Hall. Oeol, of New YorTc, p. 157, No. 

 31, fig. 1, 1 a. 



Favosites hemispheriga. Yandell and Shumard, Contrih. to Qeol. 

 of Kentuchy, p. 7, 1857. 



Emmonsia hemispheeica. Milne Edwards and Jules Haime. Poly- 

 piers Fossiles, p. 247, 1851. 



Oorallum forming large hemispheric or subspherical masses, some- 

 times two or three feet in diameter. Calyces irregular polygonal, 

 and varying in size from half a line to a little more than one line. — 

 Transverse diaphragms closely set, incomplete, or extending only half 

 way across the tube, usually flexuous and irregularly interlocked 

 along the centre of the corallite. Mural pores in one, two or three 

 series, and when there are three the central row is usually the most 

 conspicuous. Distance of pores from each other about one quarter 

 of a line. 



The only difference that exists between F. Jiemispherica and F. 

 QotJilandica is, that in the one the diaphragms are always imperfect, 

 and in the other nearly always complete. 



This species occurs abundantly in the corniferous limestone in 



