tMUE.] CANADIAN PALAEOZOIC CORALS. 147 



Cyathophtllum Dawsoni, Lambe. 

 Plate XII., figs. 4, 4a, 46. 



Za/phrentis Mimas, pars. Dawson. 1868. Acadian Geology, second edition, p. 286 



(longest specimen). 

 Cyathophyllum Dawsoni, Lambe. 1899. Ottawa Naturalist, vol. XII,, p. 239. 



" Oorallum simple, elongate, slightly curved, in the type specimen 

 broadest at the midlength, contracted near the top, annulated somewhat 

 irregularly by well marked ridges and constrictions, and by minor ridges 

 of growth, the whole outer surface, when sufficiently well preserved, 

 showing fine, close set, transverse raised lines about twelve in the space 

 of 1 mm., as well as longitudinal septal striations. Type specimen 6 cent, 

 long, as measured on the convex curve, imperfect below where the basal 

 part, possibly about 3 or 4 cent, in length, has been broken ofi'. Calyx 

 shallowly concave, smooth at the bottom, with the septa prominent on 

 the margin and sides. Tabulae broad, flat, usually- bent down at the 

 edge, close set, forming a definite central area a little over 1 cent, 

 in breadth. Septa rather crooked, of two lengths, the longer reaching 

 the tabulae and often encroaching on them, the shorter not quite half the 

 length of the larger ones, irregular, rather poorly defined, numbering in 

 all about sixty. Vesicular zone, outside the tabulae, averaging about 5 

 mm. in breadth, made up of unequal) arched dissepiments directed up- 

 ward and outward between the septa." (Lambe, 1899.) 



Locality. — Kennetcook, Nova Scotia, collected by Professor How; 

 Lower Carboniferous ; one specimen belonging to the collection of the 

 Peter Redpath Museum, McGill University, Montreal. 



Cyathophyllum Thoroldense. (Sp. nov.) 



Plate XL, figs. 5, 5a, 56. 



Corallum simple, small, cylindro-conical, curved often, more particul- 

 arly, at the base, sometimes curved in more than one direction or twisted, 

 generally sharply pointed below : varying in length from about 30 to 75 

 mm. measured along the convex curve and in breadth at the top from 

 about 12 to 20 mm. Outer surface strongly annulated at times by 

 growth swellings. Epitheca complete, with delicate transverse lines and 

 fine but distinct longitudinal septal furrows. Septa of two orders, alter- 

 nating, the first almost reaching the centre of the visceral chamber, the 

 second very short extending but slightly inward from the wall, in the 

 larger specimens numbering altogether from about sixty to eighty. The 

 septa bear carinEe on their side faces, about four occurring in a space of 

 L-4i 



