18 Mr. F. M‘Coy on some new genera and species of 
constantly distinguished by the smaller size of the stars, fewer 
radiating lamelle, and more open internal vesicular structure. 
Forms large masses in the carboniferous limestone of Kendal. 
(Col. University of Cambridge.) 
Nemaphyllum decipiens (M‘Coy). S 
Sp. Char. Weathered surface having the stars undefined, the 
lamelle of the outer area of adjoining cells appearmg conti- 
nuous, and forming a flat surface, in which the mner area of 
each star forms a deep cylindrical cell 14 line in diameter, and 
about their own diameter apart; in the bottom of those cells 
the lamelle rise to form a little cone, from the apex of which 
projects (when well-preserved) the long thin flat axis, rising to 
the level of the outer area; on the polished transverse section 
the stars are perfectly defined by distinct walls four- to six- 
angled, 2 to 3 lines in diameter, with a flat central axis half a 
line wide, and show the circular germs of young columns in 
the corners of some of the old stars; radiating lamelle thin, 
about thirty-four, of equal thickness, one half reaching the 
centre, the other barely touching the inner area, which forms 
a circle about 13 line in diameter; the radiating plates are 
connected by numerous curved vesicular plates in the outer 
area, but few or none are visible in the imner area: vertical 
section, axis thin, solid; inner area of small, curved, vesicular 
plates extending obliquely downwards and outwards from the 
axis, about two or three cells in a row; outer area separated 
from the inner by a thin vertical line, it is composed of small 
curved vesicular plates, in rows inclining obliquely upwards and 
outwards, about four cells in a row. | 
The flat broad spaces between the cups, the seeming continuity 
of the radiating lamelle of adjoining stars, and the apparent want 
of divisional walls between those latter, give the weathered sur- 
face of this coral much the aspect of the so-called Astrea Hennahii 
(Lonsd.) of the Devonian rocks ; but it is clearly distinguished by 
the divisional walls appearing distinctly in the horizontal sections, 
and by the flat, nearly solid axis, which is very obvious both in 
the polished section and weathered stars. 
Not uncommon in the carboniferous limestone of Derbyshire. 
(Col. University of Cambridge.) : 
Nemaphyllum clisioides (M‘Coy). 
Sp. Char. Stars generally hexagonal and averaging 2 lines in 
diameter: weathered surface, stars defined by a rather thick, 
prominent, crenulated divisional wall; outer area inclined down- 
wards and inwards to form a shallow cup, in the middle of 
which the inner area rises into a conical tent-like boss haying 
