U.S. NATIONAL MUSEUM 



BULLETIN 272 PLATE 7 



50/; 



15 



20 



Figures 1-21. — 1, Mcgasclerc, Ephydatia tnillsi; 2, 3, gemmosclere, £. rnillsi; i, 5, gemmo- 

 sclere, £. fluviatilis; 6, 7, gemmosclere, E. yniiUeri; 8, 9, gemmosclere, E. fortis; 10, 

 gemmosclere, £. /or/i.r with freak rotule; 11, 12, gemmosclere, E. robusta; 13, longer gemmo- 

 sclere, E. ramsayi; 14, shorter gemmosclere, E. ramsayi; 15, rotule of gemmosclere, 

 E. ramsayi; 16, 17, gemmosclere, E. facunda; 18, 19, gemmosclere, E. talaensis; 20, 

 gemmule, E. meyeni, optical sect.; 21, gemmule, E. ramsayi, optical sect, 



