U. S. NATIONAL MUSEUM 



BULLETIN 166 PLATE 79 



OSACHILA ACUTA AND H APALOCARCl NU S MARSUPIALIS 



1, 2, Osachila acuta: 1, Male (69619), X 2)4, dorsal view; 2, same, ventral view, X 21-^. 



3-9, Hapalocarcimts marsupialis: 3, Female (69177), X 3, dorsal view; 4, same, ventral view, X 3; 5, same 

 specimen in half of a Focillopora gall, X l}4; 6, the other half of the same gall, X 1)4; ", a young gall in 

 the making, X l}/2\ 8, a full-sized gall, X IM; 9, side view of same gall showing breathing holes, X IH. 



