10 HYDROZOA. 
CQHLENTERATA. 
HYDROZOA. 
Callograptus radiatus, J. Hopkinson, Rep. Brit. Assoc. (1872), 
p-. 108, and Q. J. G. S. xxx1 (1875), pl. xxxvi, f. 8 a, b, p. 665. 
Lower Arenig. Fig. 8 a, from north of Trwyn-hwrddyn, White- 
sand Bay. Presented by J. Hopkinson, Esq., F.G.S. Fig. 8 6, 
from Road-uchaf, Ramsey Island. Presented by D. Homfray, — 
Esq. 
C. salteri, Hall, J. Hopkinson, Q. J. G. S. xxx (1875), pl. xxxvi, 
f.10, p. 667. Middle Arenig; Whitesand Bay. Presented by 
J. Hopkinson, Esq. F.G.S. 
Climacograptus scalaris, Hall. Diplograptus rectangularis, F. 
McCoy, A. M. N. H. ser. 2, vi (1850), p. 271, and Contrib. 
Brit. Pal. (1854), p. 155, and Brit. Paleeoz. Foss. (1851), pl. 1B, 
f, 8—10, p. 8. Birkhill Shales ; Moffat. 
Dendrograptus arbuscula, Salter, Cat. (1873), p. 21. Muzddle 
Arenig; Whitesand Bay. Presented by Dr H. Hicks, F.R.S. 
Other specimens, J. Hopkinson, Q. J. G. S. xxx1 (1875), 
pl. xxxvi, f 5 a, 6b, p. 663. Lower Arenig; fig. 5a from 
Whitesand Bay, f. 5 b, from Road-uchaf, Ramsey Island. Pre- 
sented by Dr H. Hicks. 
D. persculptus, J. Hopkinson, Q. J. G. 8. xxx1 (1875), pl. xxxvi, 
f. 4 a—d, p. 663. Lower Arenig; creek north of Trwyn- 
hwrddyn, Whitesand Bay. Presented by Dr H. Hicks, F.R.S. 
D. ramsayi, J. Hopkinson, Q. J. G. S. xxxt (1875), pl. xxxvu, 
f. 2a, 2b, p. 664. Lower Llandeilo; Abereiddy Bay. Pre- 
sented by Dr H. Hicks. 
D. serpens, J. Hopkinson, Q. J. G. 8. xxx1 (1875), pl. xxxvui, f. 3, 
p. 665. Lower Llandeilo; Abereiddy Bay. Presented by Dr 
H. Hicks. 
Dictyograptus (Desmograptus) cancellatus, J. Hopkinson, 
Q. J. G. S. xxx1 (1875), pl. xxxvi, fi. 11, p. 668. Lower Arenig ; 
north of Trwyn-hwrddyn, Whitesand Bay. (Counterpart of the 
type.) Presented by J. Hopkinson, Esq. F.G:S. 
