Vig. 
=I 
PLATH XVILIL. 
PAGE. 
MONOLRYPA: (CORBUGARAS, Ne (SPecievsiecucie cue stele: sielel tare ion 223 
A large, subhemispheric zoarium. Nearpass section, Lo- 
cality 2A. 
Two tangential sections, showing variation in the size of 
zoccia. Same locality. (x 24). 
A vertical section from the inner portion of a zoarium. 
Same locality. (x 24). 
A vertical section from near the surface of a zoarium, 
showing the more abundant diaphragms. Same 
locality. (x 24). 
ESCHAROPORAY SSEEUIRTAUINIA® UsnuSPDssh arco ciclc eee cle cheiolciereherene 225 
A tangential section, showing the form of the zowcia in 
both their procumbent and erect portions. Nearpass 
section, Locality 2A.° (x24). 
A vertical section of the same. (x24). 
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