
Case and 
Column of 
Drawers. 
G | Not of p. 5, nor in the Synopsis. 
and 
Gk 
Gk 
LOWER BALA GROUP. 

Reference to McCoy’s 
Synopsis: and Figures of Genera. 


Pl. 18, f. 11, 12, p. 10. 
Corals, 
p. 24. 

Paleopora interstincta, p. 15. 

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

Climacograpsus bicornis, Hall (Grapt. Quebec, 
p. 111). 
Didymograpsus sextans. A common American 
species. The twin branches (éévjos) in 
this genus of Prof. McCoy’s diverge at once 
from a minute radicle: and have the cells on 
the inner edges of each branch: but in this 
species and many others the stems diverge 
so widely as to be bent backwards (Pal. N. 
Y. Vol. 1. p. 273, t. 74, fig. 3). 
Didymograpsus Murchisoni, Bock. Siluria, 
2nd ed. pl. 1, fig. 1. An extremely com- 
mon Lower Bala (Llandeilo flag) species in 
N. and 8. Wales—especially at Abereiddy 
Bay. The branches are strictly parallel and 
are broad. 
Protovirgularia dichotoma, McCoy. A very 
interesting form, branched like Dichograp- 
sus, but with large cells or groups of cells 
in double rows; and according to Prof. 
McCoy, very like the living Virgularia. 
ZOOPHYTA proper. 
(Actinozoa, Actinaria, Zoantharia, Coelenterata 
of various authors). 
Stenopora fibrosa, Goldf. sp. (Pet. Germ. pl. 28, 
figs. 3, 4). The commonest of all Millepore 
corals in the older Paleozoic rocks. 
Stenopora ramulosa, Phill. sp. (Mem. Geol. 
Surv. Vol.11. pt.1,p.385 as var.1 of S. fibrosa.) 
Nebulipora favulosa, Phill. (Mem. Geol. Surv. 
Vol. 11. p. 282, pl. 19, fig. 10). A more ir- 
regular species than the N. lens, so common 
in Middle Bala rocks. The coral consists of 
minute tubes, of which the fertile ones are 
in enlarged clusters (Monticulipora, Edw. 
& Haime, is a nearly contemporary name). 
Heliolites interstincta Linn. sp. (Edw. & Haime, 
Pal. Monogr. pl. 57, fig. 9). It is doubtful 
if this be the species, but so named by 
McCoy. 

[Extremely common in the 
Lower Bala.] 
a. 65 (Diplograpsus? Mc- 
Coy), Cairn Ryan, Wigton- 
shire, 
a. 64, Abereiddy Bay, Pem- 
brokeshire. (J. W. Salter.) 
a. 71, Near Moffat, Dum- 
friesshire. (Prof. Sedg- 
wick.) 
Golden Grove, Llandeilo, 
Tregib, Llandeilo. 
Llandeilo. 
a. 69, Llandeilo. 
