PLATE XI. 
Tryplasma vermiformis, Eth.Jil. 
Fig. 1. Flock of limestone, with corallitcs lying in various directions. 
a. Double gemination. 
b. Coral lite with epitheea. 
c. Treble gemmation. 
Tryplasma Lonsdalei, Eth. fit. 
Fig. 2. Portion of a highly- weathered corallurn. 
a. Double gemmation. 
b. Fistulre. 
Fig. 3. Another similar but smaller specimen. 
n. Double gemmation. 
b. Fistuhe. 
Fig 4. Portion of a corallurn seen in naturally-weathered transverse section. 
a. Fistula. 
