COELENTEEA— CORALS. 
53 
FUjchaphijllum, the disc-shaped Palacoctjclus, the iiiassive 
coiouies of Stromhodcs. In the next coinpaitnicnt is Cydi- 
liliylkim, in which tlie lower part of the calyx is divided by 
dissepiments into a vast number of tiny chambers or cysts. 
In the allied Goniophyllum and Jihizophyllum the calyx 
was closed by a movable lid. On the other side of the 
Case is Cyathophyllum, some specimens of which show 
several young budding from tlie calyx of the panmt. I.iast 
is the allied colonial form Acet'vularia. 
funnel) 
shafiedY— 
hibidat I 
carnieefyay 
Fig. 22. — Palaeozoic Authozoa. a, a Rugose Zoantharian Coral, Omphyma 
suhturbinatmn, from the Wenlock Lime.stone. About i natural size. 
(From Prestwich’s “Geology.”) (See Table-case 7.) %, a supposed 
Alcyonariau, Syringopora ramiilosa, from the Carboniferous Limestone 
of Yorkshire. Enlarged 3 diameters. (Table-case 5.) : 
Of the Devonian corals, the Pavositidae fill the rest of 
Case 7. Here is Plcurodictyum, frequently associated with 
a worm, as better seen in the specimens from the Eifel ; a 
similar association is common in Heliopora. These and the 
Devonian Zoantharia are mostly of the same genera as the 
Silurian corals ; but they grew more luxuriantly in reefs, 
which now form the massive limestones of Eifeliau age in 
South Devon. Here the specimens have to he studied in 
polished sections, some of which are of great beauty ; one 
may particularly note Pacliypora cervicornis in the black 
Gallery X. 
Table-case 
7. 
Wall-case 
5a. 
Table-case 
6 . 
Slab 
between 
Wall-cases 
4&5. 
Table-case 
6 . 
