PLATE II. 



Fig. I. Plexaura flava n. sp. Natural size. i a, part of branch X 5- 



Fig. 2. Plexaura platystoma n. sp. Natural size. 2 a, part of branch X 5- 

 Fig. 3. Plexaura recta n. sp. Natural size. ?>a, part of branch >c 5. 



