PLATE 55. 



PH^ENOCALPIDA, ANTHOCYETIDA et SETHOCYRTIDA. 



Diam. Page 



Fig. 1. Sethoconus facetus, n. sp. (vel Phlebarachnium facetum), . x 300 1296 

 Upper part of the shell. 



Fig. 2. Sethoconus venostis, n. sp. (vel Phlebarachnium venosum), . x 250 1297 

 Shell including the four-lobed central capsule. 



Fig. 3. Sethophormis aurelia, n. sp. (vel Leptarachnium aurelia), . x 100 1248 

 Shell seen from above. 



Fig. 4. Sethophormis aurelia, n. sp., . , . . x 400 1248 



Cephalis more enlarged, with the enclosed four-lobed central capsule. 



Fig. 5. Cladarachnium ramosum, n. sp., . . ' . x 300 1165 



Apical view. 



Fig. 6. Cladarachnium ramosum, n. sp., . . . x 70 1165 



Lateral view. 



Fig. 7. Bathropyramis interru.pta, n. sp., . . . . x 300 1160 



Apical part of the shell, from above. 



Fig. 8. Litharachnium araneosum, n. sp., . . . x 300 1163 



Apical part of the shell, from abova 



Fig. 9. Litharachnium epeira, n. sp., . . . . x 500 1164 



Oblique view of the shell 



Fig. 10. Litharachnium araneosum, n. sp., . . . x 50 1163 



Lateral view. 



Fig. 11. Periarachnium periplectum, n. sp., . . . .x500 1297 



Shell enclosing the trilobed central capsule. 



