704 R. F. TOMES ON THE OOLITIC 
quantity of thin epitheca. The upper or calicular surface is irregu- 
larly convex; and the calices are few in number, large, open, very 
deep, and cup-shaped, and have thin margins. The septa are few in 
number, stout, smooth, and preject but little into the calice, down 
the inside of which they pass, but lose themselves before reaching 
the fossular region, which consists of a smooth concave space. 
There is no appearance of endotheca, columella, or pali. 
In one of the species here described, there are obvious though rather 
distant tabule, having very much the appearance of those represented 
by Prof. Duncan as characterizing a species of Lophohelia, to which 
I have already alluded. 
ScYPHOC@NIA STAMINIFERA, n.s. Pl. XXXII. figs. 5-7. 
The corallum is small and was attached by a point, which im all 
the examples I have seen is a little curved, and from which it 
expands upwards and has a tendency to a flabelliform and lobular 
outline with an irregularly convex calicular surface. The common 
or investing wall is wholly without epitheca, and its coste are 
distinct for the whole of its height. They are alternately large and 
small, rather closely placed, and either smooth or very finely granu- 
lated. At the margin of the calices where they join the septa they 
sometimes become somewhat cristiform, the larger ones uniting with 
the septa, but more frequently two or more run together before 
joining with the septa. This is chiefly observable in the younger 
calices, the older ones sometimes having their margins very thin, 
and both the mural cost and septa reduced to a mere thread. 
The calices are more or less round except when pressed by others, 
when they become rudely quadrangular, hexagonal, polygonal, or 
even triangular. They are very large, open, and deep; and those 
which have attained the greatest size have a smooth central space, 
or fossula, upon which the septa do not encroach. | 
In a full-sized calice there are three cycles of septa and part of a 
fourth, with faint indications of other rudimentary septa. At the 
edge of the calice they are generally very thin and thread-like, but 
the primary ones increase in thickness rapidly as they pass down 
the inside of the calice, and become very thick and bulging at their 
lower and inner ends, but without much prominence. The same 
peculiar formation is visible in those of the second cycle, but in a 
less marked degree. In those of the third cycle it is not observable. 
The septa of the first cycle oceupy fully three fourths of the depth 
of the calice, those of the second are three fourths of the length of 
the first, and the remainder are short and irregular. 
Gemmation takes place between the calices, asin Bathycenia, and 
on the outside of the margin of the outer calices. 
Height of the corallum of a full-sized example 1 inch; greatest 
diameter 1 inch; smaller diameter 9 lines. Diameter of a large 
calice 9 lines, and depth of the same 5 lines. It occurs, but is not 
common, as I learn from M. Rigaux, in the Cornbrash of Le Wast. 
