554 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
A. Meniscopora 
B. Bracebridgia 
C. Schizostoma 
D. Smittistoma 
E. Adeonella 
F. Adeona 
G. Adeonellopsis 
H. Dimorphocella 
Fig. 164.- — Genera of family Adeonidae Jullien, 1903. 
I. Tremadeona 
A. Meniscopora bigibbera Gregory, 1893, X 55. 
B. Bracebridgia aculeata, new species, X 20. Middle Jacksonian of Georgia. 
C. Schizostoma crassa Canu, 1902, X 20. Lutetian of France. 
D. Smittistoma mortisaga Stoliczka, X 20. Lutetian of France. 
E. Adeonella folliculata Canu and Bassler, 1917, X 20, Middle Jacksonian of North 
Carolina. 
F. Adeona violacea Johnston, X 40. Recent. 
G. Adeonellopsis foliacea MacGillivray, 1895, X 40. Recent. 
H. Dimorphocella triton MacGillivray, 1S95. Miocene of Australia. (Ordinary zooecia with- 
out ascopore and gonoecia with ascopore.) 
I. Laminopora contort a Michel in, 1842, X 25. Recent. ( Tremadeona in error.) 
