
Case and 
Column of 
Drawers. 


Go 
Go 
Go 
Reference to McCoy’s 
Synopsis : and Figures of Genera. 
Hemithyris, p. 199. 
Pl. 14H, figs. 6—S8. 
Spirifer percrassa, 
p. 194. 

Hemithyris, p. 207. 
Pl. 14, fig. 9. 
do. 
do. 
Pl. 1 4, fig. 3, p. 188. 
Hemithyris, p. 203. 
Hemithyris, p. 205. 

So? 


UPPER BALA GROUP. 

Names and References; Observations, &c. 

Meristella angustifrons, McCoy 
(Rhynchonella of some). Meristella 
has internal spires, otherwise it 
has much the look of Terebratula. 
Davidson, Sil. Brach. t. 10, figs. 
21—27. 
Meristella? crassa, Sow. (Atrypa, 
Sil. Syst. t. 21, £1). In the Sil. 
System are figures only of the in- 
terior, which near the beak is much 
ribbed. Sil. 2nd ed. pl. 9, fig. 6. 
Meristella? subundata, McCoy. (‘The 
genus of this broad form is a 
little uncertain, says Davidson 
Sil. Brach. t. 13, fig. 4.) 
Meristella, sp. allied to WZ. crassa. 
Meristella, sp. (Looks like part of 
Pentamerus lens.) 
[Siphonotreta micula has been quoted 
from Upper Bala—it is a Lower 
Bala fossil only.] 
Rhynchonella? Lewisii, Davidson 
(Siluria 8rd ed. p. 226, foss. 58. 
Davidson, Mon. Sil. Brach. pl. 23, 
figs. 25—28). Rhynch. Lewisit is 
one of the commonest Dudley 
shells, 
Pentamerus rotundus? (Siluria, 3rd 
ed, pl. 22, fig. 18). (Pentamerus ? 
Davidson, Sil. Brach. t. 15, figs. 
9—11.) 
Pentamerus lens, Sow. (Siluria, 3rd 
ed. pl. 8, figs. 9, 10). The flat- 
tened form, and short lamelle 
distinguish it. 


Numbers and Localities. 
Upper Bala proper. 

Altffair ffynnon. 

Llandovery Group. 

a. 193, Dalquorrhan, 
Mullock, Girvan (very 
common). It also 
occurs in §. Wales. 
a. 194, Cefn Rhyddan; 
Cyrn - y-Brain; Ma- 
thyrafal; b. 24, Cwar 
Mawr, Cilgroyn (Mr 
Hughes). 
a. 195, Mathyrafal. 
Mandinam, near Llan- 
dovery. 
Mandmam, 
very. 
Llando- 
b. 210, Mathyrafal. 
b. 210*, Allt Goch. 
a, 982, Llettyrhydd- 
od, Llandovery (Mr 
Hughes); a. 192, 
Mandinam; Noeth 
Grug, Mathyrafal, 
rare. 
