f 
gat 
Fossil Corals of the family Cyathophyllide. 187 
Il. Transverse septa converging upward into an axial line. 
Genus 8. Crisiopnyttum, Dana. Quite simple, ramose or 
aggregato-glomerate. Corallum having the cells radiate ; texture 
internally at middle consisting of septa and cellules converging 
upward, but without a distinct axis ; texture exterior-to this mid- 
dle portion cellular. 
This genus includes many of the 
so-called Cyathophylla, both. simple 
and massive species. In internal struc- 
ture they resemble the Micheliniz, but 
differ in having the structure small 
cellular exterior to the central converg- 
ent portion. The bottom of the cell 
has usually a pointed conical promi- 
nence, proceeding from the character 
of the septa within; and about this 
centre the lamella sometimes appear 
twisted. These species with twisted 
lamellz may constitute, in part, the ge- 
nus Strombodes, as this name is used by 
_ Phillips ‘and Lonsdale. The name is 
from the Greek xAcovoy, a tent, and al- 
ludes to the /\-like figures which are 
made by the converging lamelle about 
the centre, as seen in a vertical sec- 
tion. The first of the annexed figures 
represents a simple turbinate species, . 
resembling externally the Cyathophylla. The other (fig. 3.) is from a 
massive Astreoid species. 
Genus 9. Micueninta, Koninck. Aggregate Cyathophyllidee. 
Corallum with excavate cells; texture of the whole interior 
characterized by oblique irregular septa, converging upward to- 
ward an axial line; axis none. 
This genus was instituted by Koninck. The species have the inter- 
nal structure of the Clisiophylla, except that there is no regularly cel- 
lular structure exterior to the central convergent portion. They differ 
from the Sarcinule in having no axis. In the Michelinia tenuisepta 
(Calamopora tenuisepta of Phillips) the general structure of the coral- 
lum is columnar. ‘ | 
Phillips, Geol. of Yorkshire, ii, 201, pl. 2, fig. 30; Koninck, Desc. 
des Anim. foss. des terrains houillers de Belgique, 31, pl. C, figs. 3a, 
36; Michelin, Icon. Zoophyt., 83, pl. 16, fig. 3. 
