U. S. NATIONAL MUSEUM 



BULLETIN 93 PL. 68 



2a 



la 





3a 



3b 



1-1B, STOMATOLEPAS PRAEGUSTATOR ; 2, 2A, S. ELEQANS; 3-3B, CYLINDRO- 



LEPAS DARWINIANA. 



FOR EXPLANATION OF FIGURES SEE PAGE 356. 



