126 ON NEW BRACHIOPODA. 
PLATE MH. 
Fig. 
1. Thecideum granulosum, Moore, perfect shell, enlarged. 
& ” Enlarged exterior of ventral valve, 
shewing attached portion. 
3. > > Interior of dorsal valve, enlarged ; 
m, the perfect calcified supra- 
membraneal disk; s, septum. 
4. + 55 Another enlarged dorsal valve; b, 
the bridge; v, visceral cavity; 
I, loop; r, granulated ridge; m, 
solid portion of supra-mem- 
braneal disk. 
3 5 ss Variety of dorsal valve, enlarged. 
6. 35 = Interior of ventral valve enlarged. 
7. Theeideum dupligatum, Moore, perfect shell, enlarged. 
8. - > Exterior of ventral valve, enlarged, 
shewing point of attachment. 
9, + a, Enlarged illustration of interior of 
dorsal valve, shewing spinose 
ridges; b, bridge, with two 
small processes. 
10. Si . Enlarged interior of ventral valve, 
shewing teeth and muscular 
depressions. 
11-12. „ = Dorsal valves, enlarged varieties. 
13. Thecideum septatum, Moore, perfect shell; enlarged. 
14. = = Dorsal valve, enlarged; shewing 
bridge and internal ridges. 
15. = . Dorsal valve; variety; enlarged. 
16. . -- Interior of dorsal valve, enlarged. 
