128 
ON NEW BRACHIOPODA. 
PLATE Il. 
Fig. 
1. Thecideum serratum, Moore, perfect shell, enlarged; 
shewing expanded base of at- 
tachment. 
2, ’ > Enlarged interior of ventral vaive, 
shewing internal ribs and bosses 
on the edge of the valve; m, 
muscular impressions; zZ, teeth; 
d, deltideum. 
3. y 5 Dorsal valve, enlarged; m, perfect 
supra-membraneal disk; and 
shewing besides the bridge, 
raised ridge and septum; also 
the grooved margin. 
4—5.  ,„ 5 Enlarged varieties. 
6. > Er Profile enlarged; shewing the pro- 
duced front and deltideum. 
7. Thecideum Forbesii, Moore, perfect shell; enlarged. 
8. er ss Interior of ventral valve, enlarged. 
9, 5 “ Interior of dorsal valve, enlarged; 
b, bridge; v. visceral cavity; m, 
supra-membraneal disk with 
granulations. 
10. 5 n Imperfect or worn variety, en- 
larged. 
11. Thecideum triangularis, D’Orb, perfect shell, enlarged. 
21: e Mr Interior of dorsal valve, var. 
13. Spirifer oolitica, Moore, enlarged exterior. 
14. = 5 Exterior of ventral valve, enlarged. 
