FROM THE UPPER AND LOWER WHITE CHALK. 13 
granular costa between them, and in the intercostal space there is a series of moniliform 
granules. 
The calice is often smaller than the body, and the wall is very thin. 
The septa are small, and there are four cycles, the last cycle being rudimentary. 
The columella is small. 
The height varies from 3 inch to 2 inches, and the diameter from } to {rds inch. 
Locality. Gravesend. In the Collection of the Rev. T. Wiltshire, F.G.S. 
3. ParasMIniaA GRANULATA, Duncan. PI. VI, figs. 5—8. 
The corallum is tall, nearly straight, finely pedunculate, and cylindro-conical. 
The calice is very large, widely open, deep, and has a thin margin. 
The columella is well developed. 
The septa are barely exsert, reach but slightly inwards, and pass downwards at once. 
They are very unequal, and alternately large and small, and there are four complete cycles 
and part of the fifth. 
The coste are subequal near the calice, and the broadest are continuous with the 
smallest septa. On the body the costa are subcristiform and in sets of four. On the 
pedicel they are very granular and very distinct. 
Height, lird inch. Breadth of calice, } inch. In the British Museum (Dixon 
Collection). 
‘This species was included by Lonsdale in his genus Monocarya, and was termed 
M. centralis. Parasmilia has the priority as a genus, and the species is evidently not 
P. centralis. 
The position of the genus Parasmilia is somewhat like that of Celosmilia, but MM. 
Milne-Hdwards and Jules Haime have created the genus Cylicosmilia for Parasmilie with 
abundant endotheca. Now, in careful sections (pl. VI, figs. 12, 13) I find that 
P. centralis and its varieties have endothecal dissepiments reaching close to the calicular 
fossa. The genus must, therefore, absorb Cylicosmilia ; and C. Altavillensis, Defrance, sp., 
of the Eocene of Hauteville, must become Parasmilia Altavillensis, Defrance, sp. 
Reuss has described an Eocene Parasmilia from Monte Grumi which is closely allied 
to the Parasmilia centralis series. 
