U.S. NATIONAL MUSEUM 



BULLETIN 272 PLATE 15 



Figures 1-12. — 1, Longer megasclere, Drulia brownii, type; 2, shorter megascleres, D. 

 brownii, type; 3, microsclere, D. brownii, type; 4, megasclere, D. geayi; S, megasclere, D. 

 cristata; 6 microsclere, D. cristata; 7, gemmosclere, D. brownii; 8, gemmosclere, D. geayi; 

 9, gemmosclere, D. cristata; 10, gemmosclere, D. batesii; 11, longer megasclere, D. batesit; 

 12, shorter megasclere, D. batesii. 



