Silurian and Devonian Fossils of Canada. 425 



corallites after growing separately for a short distance, approach 

 each other and seem to grow together or adhere to each other for 

 the space of a line and a-half or more, they then diverge and 

 again unite. These points of contact occur at distances varying 

 from three lines to six, nine, or even twelve lines. Externally 

 they exhibit numerous indistinct annulations, and also faint indi- 

 cations of longitudinal striae. 



Formation and Locality. — Devonian ; abundant in the Corni- 

 ferous limestone of Canada West. 



Collectors. — A. Murray, E. Billings. 



Syringopora nobilis (Billings). 



Description. — Corallites three lines in diameter, distant two to 

 four lines. The connecting processes in this species have not been 

 observed, but the size of the corallites is quite sufficient to separ- 

 ate it from any known species. 



Formation and Locality. — Devonian. Corniferous limestone* 

 near Woodstock Canada West. 



Collector. — A. Murray. 



Syringopora elegans (Billings). 



Description. — Corallites, one line in diameter, sometimes a little 

 more or less, distant a little less than one line ; connecting tubes 

 half a line in diameter, and distant from one line to one line and 

 a half, usually projecting at right angles, but sometimes a little 

 oblique. Epitheca with numerous annulations, generally indis- 

 tinct, but undej certain circumstances of growth sharply defined 

 and deep, so much so as to give to the corallites the appearance 

 of the jointed stalk of a crinoid. The young individuals are 

 produced by lateral budding, and in one specimen examined, the 

 whole colony appears to be based upon a broad lamellar foot 

 secretion like that which forms the base of a Favosite. 



The distance of the corallites is usually about a line, but like 

 all the other species, this one varies a good deal in this respect. 

 When some cause has intervened to prevent their regular growth 

 they are much flexed and consequently at times more distant than 

 when they have been disturbed. The connecting tubes on the 

 same side of the corallite are three or four lines distant, but gene- 

 rally on the other sides one or two others in the same space occur, 

 making the average distance one line or one line and a half. 



