Case and Reference to McCoy's 
Column of 
Drawers. 
LOWER WENLOCK GROUP. 
Numbers and Localities. 
Names and References; Observations, &c. 
97 

Synopsis: and Figures of Genera. 


Gad 
Gald 
Ga p- 303. 
GaQ | PL1Xk, fig. 40, p. 296. 
p. 311. 
Gal0| Pl.11, fig. 25, p. 311. 
Ga p. 317. 
Gal0 
Ga8 
Ga p. 316. 

GASTEROPODA. 
Pleurotomaria (or Trochonema ?) 
Two species large, turbinate. 
Hormotoma (Murchisonia), sp. Very 
slender whorls. 
Holopella gregaria, Sow. (Siluria, 
2nd ed. pl. 34, fig. 10 a). 
Trochus? cxlatulus, McCoy, proba- 
bly a Cyclonema. There are no 
species of true Zrochus in Palwo- 
zoic rocks. 
HETEROPODA. 
Bellerophon trilobatus, Sow. (Silu- 
ria, 2nd ed. pl. 34, fig. 9). The 
common Bellerophon of sandy 
deposits in Silurian rocks: but 
chiefly common in Upper Ludlow 
rock. 
Bellerophon subdecussatus, McCoy. 
A pretty subglobate species, re- 
minding us of Carboniferous 
forms. 
CEPHALOPODA. 
Orthoceras subundulatum, Portl. (Si- 
luria, 3rd ed. Foss. 62, fig. 3). 
Orthoceras primevum, Forbes sp. 
(Siluria, 3rd ed. Foss. 62, fig. 4). 


Wales and Shropshire. 
a, 610, W. L. Little- 
hope. 
b. 620, D. G. Plas 
Madoc. 
a. 460, W.L. Old 
Radnor road. 
D.G. Plas Madoe, 
and other localities 
near Llanrwst. 
a. 612, D.F. Llan- 
rwst, Denbighshire. 
b. 540, D. G. Moel 
Seisiog ; D. F. Craig 
ddu allt. 
b. 544, D. F. Cefn 
ddu. 


Westmorland and S. of 
Scotland. 

a. 610, D. F. Balmae 
shore. 
b. 541, C.G. Helms 
Knot; b.541*, How- 
gill Fell near Sed- 
bergh. 
b. 542, C. F. Road 
from Coniston to 
Hawkshead ; b.542*, 
Cold Well, near the 
Castle; b. 543, Hor- 
ton Dry Ridge. 
b. 544*, C. F. Hor- 
ton Dry Ridge. 
18 
