NO. 9 TERTIARY BRYOZOA CANU AND BASSLER 37 



convex, smooth, bordered by a line of small areolar pores much 



scattered. The aperture is large, transverse, having the form of a 



dish cover with concave proximal border ; the peristome is incomplete, 



very little salient, thin, and bears six spines ; the two proximal spines 



correspond to a slight lateral contraction of the aperture. The ovicell 



is large, globular, not closed by the operculum. A small oral avicu- 



larium placed on the line of the pores adjacent to the peristome is 



visible on one side of the aperture. 



Measurements. — 



fha = o.24 mm . \Ls=i.oo mm 



Aperture^ , Zooecium<^ , _ ^^ 



^ I /a= 0.30-0.33 mm 1 /.c: = o.6o mm 



Occurrence.— Bsdcomhian beds at Muddy Creek, Victoria. 



Holotype.— U.S.N. M. no. 85760. 



HIPPOMONAVELLA Canu and Bassler, 1934 

 HIPPOMONAVELLA ACUTIROSTRIS, n. sp. 



Plate 7, fig. 5 



Description. — The zoarium is incrusting. The zooecia are distinct, 

 separated by a salient thread, polygonal, elongated ; the frontal is 

 little convex, smooth, bordered by very small and numerous pores. 

 The aperture is suborbicular, very little elongated ; the two cardelles 

 are thin, salient, median ; the peristome is terminal, thin, little salient. 

 The avicularium is thin, triangular, elongated, almost adjacent to the 

 peristome ; the beak is very sharp and salient. Ovicell unknown. 



Measurements. — 



fha — O.T4 mm , {Lc = o.y2 mm 



Aperture-^ , Zooecium-^ , ^ ^„ 



^ 1 /a=o.i3 mm I 12 = 0.4'/ mm 



Number of zooecia in 4 mm^ 13. 



Occurrence. — Balcombian beds at Muddy Creek, Victoria. 



Holotype.— U.S.N. M. no. 85757. 



Family SMITTINIDAE Levinsen, 1909 



SMITTINA Norman, 1903 



SMITTINA PERFORATA, n. sp. 



Plate 7, fig- 3 



Description. — The zoarium is unilamellar. The zooecia are distinct, 

 separated by a very small furrow, elongated, elliptical ; the frontal 

 is convex, marginated by a salient pad, convex and formed by a 

 smooth pleurocyst surrounded by a line of six to eight pairs of large 

 areolar pores separated by very short costules. The aperture is sub- 



