'-•"86. I CANADIAN PALAEOZOIC CORALS. 145 



in size, consisting of mere ridges, which are acute and moderately pro- 

 minent in the upper portion of the sides of the cup, but which are much 

 more strongly developed at and towards its base. Internal structure, as 

 shown in longitudinal sections, consisting of vesicular tissue between the 

 septa; tabulae almost but not entirely absent, a single transverse 

 diaphragm at the bottom of the cup being observable in two out of the 

 ten specimens collected." 



Dimensions of an average sized specimen : "greatest height, 39 mm., 

 maximum width, 29 mm. In another specimen the greatest height is 

 about 40 mm. and the width at the summit, 32 mm." (Whiteaves). 



Localities. — Onion Point, Lake Manitoba, J. F. Whiteaves and J. B. 

 Tyrrell, 1888 ; small island at extreme south end of Lake Winnipegosis 

 and at the Lower and Upper Salt Springs, Red Deer River, J. B. Tyrrell, 

 1889. Devonian. 



Cyathophyllum CiESPiTOSUM, Goldfuss. 

 Plate XII., figs. 3, 3a, 36. 



Cyathophyllum ccespitosum, Goldfuss, 1826. Petrefacta Germaniae, vol. I., p. 60, pi. 



XIX., figs 2a-(i. 

 II II MUne-Edwards and Haime, 1861. Polyp. Foss. des Terr. 



Palaeoz., p 384. 

 II II Milne-Edwards and Haime, 1853. Brit. Eoss. Corals, p. 229, 



pi. LI, figs 2, 2a, 26. 

 II II Whiteaves, 1891. Gontr. to Can. PalEeon., vol. I., pt. III., 



p. 200, (Peace River specimen), also pt. IV., p. 264. 



This species is represented by a small mass of corallites increasing by 

 lateral calicinal gemmation, collected by Prof. John Macoun, in 1875, 

 on the Peace River near the mouth of Red River ; Devonian (Cu- 

 boides zone). The specimen in question may be described as * follows : 

 corallum bushy, made up of a loose aggregation of corallites, averaging, 

 when full grown, about 9 mm. in diameter, that diverge radially from a 

 basal central point and form a mass 6 or 7 cent, high and about 12 cent, 

 in diameter. Small corallites spring from the sides of the calyces of the 

 mature ones. Corallites cylindrical, slightly but definitely constricted at 

 irregular intervals. Epitheca rather smooth, with feeble transverse lines 

 of growth and faint longitudinal septal strise. Calyces moderately deep, 

 with steep sides, showing primary and secondary septa, the former of which 

 pass nearly to the centre of the bottom of the cup. Septa, numbering in 

 all from about forty-four to forty-eight, alternately long and short, the 

 primaries, as seen in transverse sections, almost reaching the centre 

 of the visceral chamber, whilst the secondaries are scarcely discernible 

 beyond what appears to be a thickening of the wall, formed by the union 

 L— 4 



