SEPTARIUM WITH SHELLS. 383 
argillaceous limestone, from a septarium (nodule divided by 
Jissures), abounding in spiral univalve shells, called Z’urri- 
telle, Fig. 1 is a perfect shell of the same species, extracted 
4\\WAH 
AUD 
Lien. 122. TURRITELLZ, FROM BRACKLESHAM, Sussex. Tert. 
Fig. 1.—TURRITELLA CONOIDEA; the perfect shell: nat. 
2.—SEPTARIUM, With TURRITELLZ#; a polished slab: 4 nat. 
3.—A cast of one of the shells, in calcareous spar: nat. 
from soft clay; and jig. 3, a cast in calcareous spar, ob- 
tained from the septarium. In the polished slab, fig. 2, 
sections of numerous shells are seen. The dark partitions, 
