NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
101 
Geological distribution . — The foreign occurrences are as follows: Lutetian of 
the environs of Paris (Canu) ; Latdorfian of Germany (Reuss, Stoliczka) ; Rupelian 
of Germany (Reuss, Schreiber) ; Chattian of Germany (Reuss, Philippi, Roemer) ; 
Miocene of Australia (Waters, MacGillivray) ; Helvetian of the Plerault in France 
(Canu), of Italy (Neviani), of Egypt (Canu) ; Zanclean of Italy (Seguenza) ; 
Fig. 26. — Genus Adenifera Canu and Bassler, 1917. 
A-G. Adenifera armata Haswell, 1880. A. Several zooecia, X 25; av, avicularium, op, 
opesium. B. Avicularium, X 85. C. Mandible of the avicularium, X 85. D. Decalcified avicu- 
larium showing retractor muscles (a), divaricator (6), with tendon attached to the mandible 
in the middle of the base, and the “ peculiar body ” (c), X 85. 
E. Decalcified zooecium showing the avicularian chamber on the left with muscles, as in 
fig. D, and the glandular chamber (gc) on the right, X 85. 
F. Lower portion of lateral gland, X 320. 
G. Opercular region, seen from the interior, X 50. The opercular muscle is attached to a 
linear sclerite (sc) on the membranous operculum, and from the sclerite there is also a muscular 
band to the tentacular sheath (t. s.). Two protoplasmic bands pass to the distal septula. 
(A-G after Waters, 1913.) 
Plaisancian of England (Busk), of Belgium (Lorie), of Italy (Manzoni) ; Astian 
of Italy (Seguenza) ; Quaternary of Italy (Sequenza) and of Argentina (Canu). 
Habitat. — The living forms are found in the Atlantic off Florida, in the Pacific 
off Australia, in the Indian Ocean at Zanzibar and Ceylon, and in the Red Sea, 
where they have been brought up from depths of 18 to 51 meters. In the Gulf of 
Florida they have been found at depths of 16 to 47 meters. 
Plesiotypcs . — Cat. Nos. 63874, 63875, U.S.N.M. 
