EXPLANATION OF PLATES. 



PLATE i. 

 Cladoncma maycri ./>. n. 



1. [Medusa of Cladonema maycri. X 25. 



2. Cladoncma mayeri. Aboral view. 



PLATE 2. 



Cladoncma mayeri sp. n. 



3. Manubrium, much enlarged, showing gastric pouches, oral tentacles and bands 



of markings. 



4. Top of bell. Dilations and branching of canals and pattern of white markings. 



5. Top of abnormal bell, showing eleven canals arising from seven primaries. 



6. Mouth and oral tentacles of medusa. 



7. Hydroid stage of C. mayeri, showing two verticils of tentacles, lower set con- 



tracted. 



8. Hydroid with tentacles fully extended. Bud in early stage of development upon 



column, showing granular endoderm. 



9. Medusa-bud, further developed, with tentacles forming. 



10. Medusa-bud with tentacles elongating. Oral view. 



11. Medusa bud with tentacles developing. Oral view. 



PLATE 3. 



Campanularia and Aglaura. 



12. Campanularia macrothcca, new species. Stalk with nutritive and reproductive 



zooids. X loo. 



13. Empty hydrotheca of C. macrotheca. 



14. Aglaura ciliata, new species. Enlarged. 



15. Oral lappet of A. ciliata. 



16. Manubrium of A. ciliata, sectional view. 



PLATE 4. 



Cassiopea, Polyclonia, Cladoncma. 



17. Polyclonia frondosa. 



18. P. frondosa, oral view. 



19. Cassiopea .ramachana, Bigelow. 



20. C. .ramachana. Oral view. 



21. Cladoncma mayeri sp. n. Side view. X 62. Photo. From life, by author. 



22. C. Maycri. Oral view. < 62. Photo. From life. 



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