Ill 



Ctathophyllum Ekiphylb. (N. sp.) 



Description. — Corallum simple, elongate, cylindro-turbinate, large. Cup 

 rather deep, conical. Inner area about one-third the whole diameter, 

 with the transverse septa well defined but undulating, in some places nearly 

 in contact, and in others separated from half a line to one line or a little 

 more. Outer area with large acutely-lentiform cells sloping upwards and 

 outwards, from three to six lines in length. Surface with a thin epitheca, 

 the edges of the septa shewing, as it were, through it, about one line 

 distant from each other, and often with what appear to be one or two 

 smaller septa between each two of the larger. There are also numerous 

 annulations of growth, of various sizes, the larger distant from four to 

 nine lines from each other, and each being slightly more prominent on its 

 upper than on its lower edge. Fine transverse annulating striae, from six 

 to eight in one Une, are also visible where the surface is well preserved. 

 The radiating septa are not distinctly visible in the specimens, but they 

 appear to be about a hne apart at the margin. 



Length from 4 to 10 inches. Diameter from 2 to 2| inches. 



This species differs from both 0. angustum and C. Anticostiense in the 

 greater size of the vesicles composing the internal structure. 



Locality and Formation. — Anse a la Vieille, Bay of Chaleurs. Middle 

 Silurian. 



Qollector. — Sir W. E. Logan. 



Cyathophyllum nymphalb. (N. sp.) 



Description. — Corallum turbinate, curved at the base, expanding to a 

 width of three inches in a length of two and a half. Cup shallow, 

 concave, with a small projection in the middle, indicating the inner area. 

 Radiating septa, as indicated by the sulci on the exterior, about one 

 hundred. Inner area well defined in the longitudinal polished section, 

 about one-sixth the whole diameter ; the tabulae very thm and numerous, 

 apparently five or six in one fine. The outer area consists of an exceedingly 

 compact vesicular structure, the largest cells being scarcely half a line in 

 length. Outer surface with strong convex longitudinal ribs about one line 

 in width, the sulci separating them, sharply rounded or angular at the 

 bottom. 



The only specimen of this species that I have seen is of a remarkable 

 shape. On one side of the cup the margin curves downwards, and on the 

 other, upwards. It is barely possible that the concave extremity which I 



