U. S. NATIONAL MUSEUM 



BULLETIN 82, PART 2 PL. 46 



1317 



1319 



1318 



1321 



GASTRULAE OF ANTEDON MEDITERRANEA, STRUCTURE AND DEVELOPMENT OF SACCULUS OF SAME 

 SPECIES, AND REGENERATING ARM OF FULLY GROWN PENTACRINOID OF HATHROMETRA SARSII 



FOR EX"IANATION OF PLATE SEE PAOE 76 



