98 REPORT—1868. 
species, which is hardly distinguishable from M. coronula, in the Neocomian 
of Caussols (var.). 
The variety of the species in the red rock rather resembles the Neocomian 
species in its diameter and flatness. The genus had a very short vertical 
range, and was represented in later times by the Stephanophyllic. 
Subfamily Lornosreri as, 
Genus CycLoxitEs. 
This genus almost characterized the geological horizon of the Craie-Tuffeau 
of Gosau, the Ile d’ Aix, les Martigues, Vaucluse, Corbiéres, Uchaux, &ce. A 
few species are found in the White Chalk, in the Eocene, and Miocene. There 
are some doubtful Neocomian species; and the genus is extinct. 
Cyclolites polymorpha, Goldfuss, sp. 
The corallum is very irregular in shape, generally subelliptical, and not 
very tall. The highest point of the calice is subcentral, and the central 
fossula is very variable in its place. The septa are very numerous, thin, close, 
flexuous, crenulate, and larger in front. 
The solitary specimen of this form is small, but the fossula and septa are 
tolerably distinct. 
Genus Poposrris, Duncan. 
The corallum has a large concave base, by which it is attached to foreign 
bodies. The epitheca commences at the basa] margin, and is stout and 
reaches the calicular margin. The height of the corallum varies. The calice 
is generally smaller than the base, and is convex. The septa are numerous 
and unequal, the largest reaching the rudimentary columella. The central 
fossula is circular and small. The cost are seen when the epitheca is worn ; 
they are distinct, connected by synapticulz, and are straight. 
The genus has been created to admit Micrabacie with adherent bases and 
more or less of a peduncle. 
Podoseris mammilliformis, Duncan. 
The corallum is short, straight, and broad. The base is concave, and is 
either larger than the calice, or there is a constriction immediately above it, 
and it is slightly smaller than the calice. The calice is round, convex, 
depressed in the centre, and is bounded inferiorly by the epitheca. The 
lamine are stout, unequal, curved superiorly, and often joi. There are five 
cycles in six systems, the last cycle being very rudimentary. The synapti- 
cule are numerous. The coste are straight and subequal, and are smaller 
than the septa. The ornamentation of the septal and costal apparatus varies; 
and there may be an almost moniliform series of enlargements on the septa, 
or they may be plain. The columella is formed principally by the ends of 
the longest septa. The height of the corallum appears to be determined by 
the growth of the body between the base and the calice. 
Height of the corallum } inch. Breadth of calicular margin + inch. 
Height 1 inch. Breadth of calicular margin 7 inch. 
Height 4 inch. Breadth of calicular margin 4} inch. 
Monstrosities are often found amongst specimens of this species. 
Podoseris elongata, Duncan. 
The corallum is tall, a broad circular and slightly concave base, a long 
conico-cylindrical stem, and a small calice much narrower than the base. The 
epitheca is in bands. The cost are alternately large and very small, some- 
what distant, wavy, and united by synapticule, many of which are oblique. 
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