PLATK I. 



Fig. i. Plexaura r ata n. sp. Natura] size. \n, part of branch 5. 



Fig. 2. Plcxciurit attenuata n. sp. Natura] size. 2a, part of branch 5. 

 Fig. 3. Plexaura pinnata n. sp. Natural size. 3a, part of branch 5. 



