PLATE IL 



Fig. I. Plexaura flava n. sp. Na':ural size. \a, part of branch X 5. 



Fig. 2. Plexaura platy stoma n. sp. Natural size. 2 a, part of branch < 5. 

 Fig. 3. Plexaura recta n. sp. Natural size. 3«, part of branch ■ 5. 



