U.S. NATIONAL MUSEUM 



BULLETIN 272 PLATE 11 



Figures 1-20. — 1, Megasclere, Umborotula boi^orensis; 2, megasclere, Dosilia plumosa; 

 3, gemmosclere, D. plutnosa; 4, acerate microsclere, D. plumosa; 5, stellate microscleres, 

 D. plumosa; 6, megasclere, D. palmeri; 7, gemmosclere, D. palmeri; 8, acerate microsclere, 

 D. palmeri; 9, stellate microsclere, D. palmeri; 10, megascleres, D. hrouni; 11, gemmo- 

 sclere, D. brouni; 12, 13, microscleres, D. brouni; 14, megasclere, D. radiospiculata; 15, 

 longer gemmosclere, D. radiospiculata; 16, shorter gemmosclere, D. radiospiculata; 

 17, range of microscleres, D. radiospiculata; 18, gemmule, Umborotula bogorensis, optical 

 sect.; 19, gemmosclere, U. bogorensis; 20, range of spicular components, Spongilla novae- 

 terrae. 



