NORTH AMERICAN EARLY TERTIARY BRYOZOA. 



101 



Geological distribution. The foreign occurrences are as follows: Lutetian of 

 the environs of Paris (Canu) ; Latdorfian of Germany (Eeuss, Stoliczka) ; Rupelian 

 of Germany (Reuss, Schreiber) ; Chattian of Germany (Reuss, Philippi, Roemer) ; 

 Miocene of Australia (Waters, MacGillivray) ; Helvetian of the Herault in France 

 (Canu), of Italy (Neviani), of Egypt (Canu); Zanclean of Italy (Seguenza) ; 



FIG. 26. Genus Adcuifera Canu and Bassler, 1917. 



A-G. Adenifera urmata Haswell, 1880. A. Several zooecia, X 25; or, avicularium, op. 

 opesium. B. Avicularium, X 85. C. Mandible of the avicularium, X 85. D. Decalcified avicu- 

 lariuni showing retractor muscles (<i), divaricator (6). with tendou attached to the inaudible 

 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 (so) on the membranous operculum, and from the sclerite there is also a muscular 

 band to the tentacular sheath (t. s.). T\vo protoplasmic bands pass to tlie 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 54 meters. In the Gulf of 

 Florida they have been found at depths of 16 to 47 meters. 



Plcsiotypcs.Csit. Nos. 638T4. 03875, U.S.N.M. 



