NO. 9 TERTIARY BRYOZOA CANU AND BASSLER 3 



MEMBRANIPORA Blainville, 1830 

 MEMBRANIPORA AREOLATA, n. sp. 



Plate I, fig. 2 



Description. — The zoarium is bilamellar ; the fronds have four or 

 five longitudinal rows of zooecia on each face. The zooecia are distinct, 

 separated by a furrow or by a quadrangular area more or less broad, a 

 little elongated, elliptical. The mural rim is thin, fiat, of irregular 

 width, smooth, and bears distally a small transverse triangular avicu- 

 larium with two denticles and a pointed beak. The opesium is large, 

 of the same form as the zooecium. The quadrangular area is very 

 irregular in form and position. Ovicell unknown. 



Measurements. — 



r/jo = 0.40-0.50 mm . [Ls = o.6o mm 



Opesium-^ , „ ZooecnuiH , ^ ^ ^ ^^ 



i^ Wo = o.35 i™" 1 /5' = o.45-o.5o mm 



Occurrence. — Janjukian ; Aire Coastal Beds, Victoria. 



//0/0/v/'^.— U.S.N. M. no. 60153. 



VINCULARIA Def ranee, 1829 

 VINCULARIA GIGANTEA, n. sp. 



Plate I, fig. 4 



Description. — -The zoarium is rodlike (vincular) in form, composed 

 of four or five longitudinal rows of cells arranged around a central 

 line. The zooecia are distinct, gigantic, much elongated, rounded 

 distally, narrowed proximally. The mural rim is thin, smooth, salient, 

 rounded ; the cryptocyst is very large, flat, smooth, or very finely 

 granulated ; the opesium is elliptical, elongated, margined by a salient 

 swelling, terminal, and much smaller than the cryptocyst. 



Measurements. — 



. r/zo = 0.50-0.65 mm . [Lz = 2.io mm 



OpesiunK , ^ Zooecmm-^ , ^„ 



i 1/0 = 0.30 mm 1^ /.c: = o.65 mm 



Occurrence. — Janjukian beds at Anticline Creek, Dartmoor, 



Victoria. 



Cotypes. — U.S.N.M. no. 85905. 



OTIONELLA Canu and Bassler, 19 17 

 OTIONELLA CIRCUMDATA, n. sp. 



Plate I, figs. II, 12 



Description. — The zoarium is a small, truncated, solid cone ; the 

 base is slightly convex and ornamented with sinuous radial lines ; at 



