FROM THE UPPER AND LOWER WHITE CHALK. 5 
The septa are continuous with what appear to be rudimentary intercostal spaces. 
The laminz are twelve in number; they project into the circular calice, but are not 
exsert. A section proves that they are very stout, even low down in the corallum. 
Length of the corallum, 1 inch. Diameter of the calice, th inch. 
Locality. Charlton, Kent. In the Collection of the Rev. T. Wiltshire, F.G.S. 
‘This species is mimetic of Parasmilia serpentina, Ed. and H., from the same geological 
horizon, just as Zrochosmilia cylindrica is mimetic of Parasmilia cylindrica. The Stylo- 
trochi of the Cambridge Upper Greensand are closely allied to this species, which is found 
in the Grey Chalk and Lower White Chalk. 
ASTRAID A. 
FAMILY 
Genus—TROCHOSMILIA. 
Sub-genus—C@10SMILIA. 
It is a great question whether Celosmilia can stand as a genus. It is impossible to 
separate its species from those of Zrochosmilia by an external examination, and sections 
prove that there is no columella and a very scanty endotheca. Still there is an endo- 
theca, and the visceral cavity of the Coral was not open from top to bottom, as in the 
Turbinolide. It is true that there is a facies common to the Calosmilia, and that they 
are a natural group; but, in fact, they do not differ from a Zrochosmilia with scanty 
endotheca. On studying the genus Zrochosmilia it will be noticed that many of its 
species have never been described with reference to their endotheca. Many were deter- 
mined from one or two specimens, and sections of the majority have not been made. 
Now, Zrochosmilia sulcata, Kd. and H., has very little endotheca; it is a species from 
the Gault, and the Celosmilig are all from the Cretaceous, Eocene, and recent Coral- 
faune. In placing Celosmilia as a sub-genus, but included in Zrochosmilia, it must be 
admitted that the classification becomes simpler and more natural. Since MM. Milne- 
Edwards and Jules Haime published their ‘Hist. Nat. des Coralliaires,’ some new 
species of Calosmilia have been published or described. 
The following species have been described : 
1. Celosmilia poculum, Ed. & H., recent. 
Pi f Faujasi, ‘ White Chalk, Ciply. 
3. os punctata, 4 ‘; 
4. ¥ laxa, a Norwich Chalk. 
5. ye Edwardsi, D’Orb., Sezanne. 
6. 5 Atlantica, Martin, sp., Timber Creek, New Jersey. 
he - excavata, Wagenow, sp., Chalk of Rugen. 
8. et radicata, Quenstedt, Nattheim. 
