NO. 9 TERTIARY BRYOZOA CANU AND BASSLER 29 



the frontal is convex, formed by a granular tremocyst with very small 

 and numerous pores. The aperture is semielliptical, transverse ; the 

 proximal border bears a small rounded sinus ; the peristome is com- 

 plete, thin, smooth, little salient and separated from the separating 

 thread only by a small furrow. The avicularium is small, orbicular, 

 a little salient, always placed in one of the two lateral angles. The 

 ovicell is large, globular, placed on the distal zooecium, hyperstomial, 

 closed by the operculum ; its surface is granular. The aperture of the 

 ovicelled zooecia is larger. 

 Measurements. — 



fha = o.io-o.i2 mm . rL.s:=: 0.90-1.00 mm 



Aperture<^ , ^^^ ZooecumiK , ^ ,.^ ^ r^ 



^ 1/0 = 0.15 mm I fe = 0.50-0.60 mm 



Occurrence. — Janjukian beds at Anticline Creek, Dartmoor, 



V^ictoria. 



Cotypes.— U.S.N. M. no. 85856. 



SCHIZOPORELLA MACGILLIVRAYI, n. sp. 



Plate 9, fig. 5 



.SchizopovcUa phyniatopora MacGillivray (pars). Trans. Roy. Soc. Victoria, 

 vol. 4, p. 80, pi. II, fig. 3 (not 2), 1895. 



Measurements. — 



r/;a = 0.16 mm . rL.c; = 0.77-0.85 mm 



Aperture|^^_^^g_^^^ mm Zooecium| i^^^_^^.^_^^ „,„, 



Structure. — It is quite impossible that figures 3 and 2 of MacGil- 

 livray refer to the same species, for there is a great difference in the 

 apertural dimensions. We consider figure 3 as representing a distinct 

 species, S. macgillmrayi, very close to 6*. alata, and characterized by 

 its orbicular aperture (not transverse), its rounded proximal sinus, 

 absence of avicularia, and zooecia frequently axially disarranged. 



Occurrence. — Balcombian beds at Muddy Creek, Victoria. 



Holotype.— U.S. N.M. no. 85859. 



SCHIZOPORELLA TENUILAMELLOSA, n. sp. 



Plate 9, fig. 4 



Description. — The zoarium is bilamellar ; the fronds are flat, broad, 

 and very thin. The zooecia are distinct, separated by a shallow fur- 

 row, rectangular, very long ; the frontal is a little convex, smooth, 

 bordered with about 10 large areolar pores. The aperture in transverse 

 aspect is semielliptical ; its proximal border is rectilinear and notched 

 by a very small triangular sinus. Each zooecium bears on the median 

 longitudinal axis of the frontal two very small avicularia; the first 



