114 
SILURIAN. 

Case and | 
Column of| 
Drawers. 
Reference to McCoy’s 
Synopsis: and Figures of Genera. 

Names and References; Observations, &c. 
Numbers and Localities. 


FC 
Ge 




Britain. An Arctic form from the northern 
expeditions is in the cabinet of the Geol. 
Survey. In this the successive growths of 
the calyx are so regular, and the limb 
turned so much back, that the whole re- 
sembles a Chinese pagoda, whence the 
name Ptychophyllum pagoda, Salter. 
Ptychophyllum patellatum, Schloth. (Strom- 
bodes plicatum, Lonsd., Siluria, 2nd ed. 
Foss. 52, fig. 5, pl. 38, fig. 4). 
Goniophyllum, Milne Edwards and Haime. 
Square or semi-cylindrical coral-cups, of 
small size, not above an inch or two in 
height; with obscure septa, arranged in 
crucial fashion. The great peculiarity of 
this fossil (probably the remnant of a large 
class of extinct forms) seems to be that all 
its species, of which several have been de- 
scribed by Lindstrém from Sweden, are 
furnished with an operculum (a) or ld— 
and it is difficult to see how the tentacles 
performed their duty. Calceola, the Devo- 
nian fossil, hitherto thought a Brachiopod, 
is of this group. 
Goniophyllum pyramidale, Hisinger, (Leth. 
Suec. p. 101. G. Fletcheri, Milne Edwards, 
t. 68, fig. 3, p. 290; G. Fletcheri, Salter in 
Siluria, 2nd ed. p. 244). It varies much 
in shape; the operculum has not been 
found yet in England, but should be looked 
for. 
Compound cup-corals. 
Only differ from single cups by the aggregate 
growth of the buds, or young corallites, 
which do not fall off the parent, but are | 
attached and grow hexagonal by compres- 
sion amongst one another. 

In every Wenlock collec- 
tion. 
a. 335, Dudley, F. C.; Mal- 
vern, Wenlock Shale; b. 
713, Dudley (J.Gray, Esq.). 
