50 



CONTRIBUTIONS TO CANADIAN PAL^EONTOLOG Y . 



flexuous corallites that increase by lateral budding and are placed in 

 communication with each other by hollow, cylindrical, horizontal tubes; 

 septa represented by longitudinal rows of small sharply pointed spines ; 

 tabulae irregularly funnel-shaped, invaginated, generally incomplete, often 

 in the form of cystose plates inclined upward from near the centre of the 

 corallites to the sides, typically leaving a central space ; corallites at the 

 base prostrate and either contiguous and forming a leaf-like expansion, or 

 openly reticulated ; epitheca with annular growth lines. 



The distance apart of the corallites and their thickness vary consider- 

 ably in different species. The hollow connecting processes are obsolete 

 and replaced by a single circular opening when the corallites by flexure 

 or geniculation are brought into contact with each other. The tabulae 

 are typically somewhat funnel-shaped and form a more or less continuous 

 tube-like space in the centre of the corallites, or they may consist of a 

 variable number of plates resting on each other and curving obliquely 

 upward toward the wall, but so arranged as to leave a central space ; the 

 number of cystose plates necessary to complete the circumference of a 

 corallite is very variable. On account of their smallness the spiniform 

 septa are seldom preserved. 



Syeingopoka verticillata, Goldfuss. 



Syringopora verticillata, Goldfuss. 1826. Petrefacta Germanise, vol. I., p. 76, pi. 



XXV., figs. 6a, 66. 

 M II Billings. 1858. Rep. of Progress for 1857, Geol. Survey of 



Canada, p. 170. 

 II II Rominger. 1876. Geol. Sur. Mich., Poss. Corals, p. 79, pi 



XXX., figs. 1 and 2. 



Billings describes this species as " forming large masses, corallites 

 nearly straight, about two lines in diameter, and from two to three lines 

 distant ; connecting tubes three or four lines distant, verticillating, or 

 three or four radiating from the tube at the same level in different direc- 

 tions, like the spokes of a wheel." The specimen from which this descrip- 

 tion was taken was collected at the head of Lake Temiscaming, Que. 

 (Niagara) by Sir Wm. E. Logan in 1845. The original specimen? 

 referred to by Goldfuss are from Drummond Island (Niagara), Lake 

 Huron. 



In 1887 additional material was obtained by Dr. R. Bell at the north 

 end of Lake Temiscaming, Que., and in 1893 and 1894 Mr. A. E. 

 Barlow collected specimens on the Isle of Mann (Burnt Island) at the 

 north end of the lake. In these specimens it is seen that the corallites 

 in some individuals are so close together as to be nearly in contact, in 

 which case the connecting bars are almost obsolete ; in others the corallites 



