128 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



Zaphrentis Minas, Dawson. 

 Plate VII., figs. 7, 7a, 7b. 



Zaphrentis Minas, pars. Dawson. 1868. Acadian Geology, second edition, p. 286, small 



specimens, fig. 48a. 

 Zaphrentis Minas, Lambe. 1899. Ottawa Naturalist, vol. XII., p. 254. 



" Corallum simple, turbinate, small, slightly curved, about twice as long 

 as broad, pointed below and obscurely marked transversely by low accre- 

 tion ridges. Epitheca complete, with distinct longitudinal septal furrows 

 and fine, close-set, transverse growth lines showing on the surface. Calyx 

 deep, with thin vertical walls and a moderately flat bottom, the depth 

 equal to more than one-half the width. Tabula rather irregular, crossing 

 from side to side, with minor incomplete tabula? at times resting on the 

 principal ones. Septa, from about sixty-five to seventy-five in number, 

 alternately long and short, the long ones passing to the centre, the re- 

 mainder only about 1 mm. in length; on the walls of the calyx the prim- 

 aries are reduced to thin, sharp-edged ridges, and the secondaries become 

 almost obsolete. Fossette of moderate depth, extending outward to the 

 wall on the flat or concave side of the coral. 



" The figure accompanying the original description does not give a cor- 

 rect idea of the depth and form of the calyx ; the specimen from which 

 the drawing was evidently made is 40 mm. in length along the convex 

 curve, about 23 mm. in maximum breadth near the top, and the calyx, as 

 seen in a longitudinal section of the corallum, is about 12 mm. deep. 



"Locality. — West River, Pictou, N.S., collected by Professor How; 

 Lower Carboniferous formation. Two small specimens and the basal ex- 

 tremity of a third, the property of the Peter Redpath Museum, McGill 

 University, Montreal. 



" This species is very closely related to, if not identical with Zaphrentis 

 Enniskilleni, Milne-Edwards and Haime (Brit. Foss. Coras, p. 170, pi. 

 XXXIV., fig. l,)of the Carboniferous limestone of the north-west of Ire- 

 land.'' (Lambe, 1899.) 



The writer is desirous of here placing on record his indebtedness to the 

 late Sir J. William Dawson for the loan of the types of Z. Minas, Cyatho- 

 phyllum Dawsoni and Clisiophyllum Billingsi, with permission to make 

 sections of them. 



Genus Amplexus, Sowerby. 1814. 



Amplexus, Sowerby. 1814. Mineral Chonchology, vol. I., p. 165. 



Corallum simple, elongate, subconical. Epitheca complete. Tabulae 

 highly de ^eloped. Septa very short, although still differentiated into 



