Case and 
Column of 
Drawers. 
SILURIAN. 

Reference to McCoy’s 
Synopsis: and Figures of Genera. 
Names and References; Observations, &c. 


Gd7 
FC 
Gd5 
Gd7 
FC 
Gd5 
Gd7 
FC 
Gd5 
Gd5 
Gd5 
Gd5 


Genus, p. 273. 
Pl. 1 kK, fig. 9, p. 273. 


p. 283. 
(Nucula, of many authors.) 
Nucula, p. 285. 

Cardiola interrupta, Brod. (Siluria, 2nd ed. 
pl. 28, fig. 12). A shell universal in Wenlock 
rocks throughout Europe. 
Clidophorus, sp. McCoy (oval shells). The ge- 
nus is one of the Arcacew, the teeth of 
which lie parallel to the hinge border. The 
shells are thin. 
Clidophorus planulatus, Conrad, sp. (Hall, Pal. 
New York, t. 82, fig. 9). 
[Actinodonta, (Phill.) sp. Related closely to 
Clidophorus, and possibly included in it. 
Oval shells, not thick as most Arcacew, and 
with teeth on both sides lying parallel to 
the hinge-plate; and a few central radiating 
ones, A species very common in the May 
Hill sandstones of Marloes Bay.] 
Cuculella, oval sp. like C. antiqua of the Lud- 
low rocks. The shells of this genus are 
endless in minute variation in all Silurian 
rocks, rare in Cambrian. 
Ctenodonta, Salter. Intended to replace Nu- 
cula for those abundant species in old rocks, 
all of which have external ligaments. 
Ctenodonta anglica, Sow. (Siluria, 2nd ed. pl. 
23, fig. 10). The hinge-lines are very much 
bent interiorly in this broad triangular spe- 
cies. 
Ctenodonta, sp. 1. 
Ctenodonta, sp. 2. 
Ctenodonta, sp. 3. 
Ctenodonta, sp. 4. A wide triangular form, 
like many Bala species in foreign lands, but 
not usual for Britain, 

Numbers and Localities, 

b. 797, Erw Gilfach, Builth; 
b. 798, Maen Goran, Builth. 
a. 826, Dudley, F.C. 
a. 845, Shale, Dudley, F.C.; 
a. 915, Keeper’s Lodge, 
Golden Grove. 
a. 830, Dudley, F. C. 
b. 799, Dudley, F. C. 
b. 800, Dinas Bran, Llan- 
gollen. 
a, 835, Dudley, F.C. 
a. 832, Dudley, F.C. 
a, 833, Dudley, F.C. 
a. 834, Dudley, F. C. 
a, 834*, Dudley, F.C. 
