NO. 9 TERTIARY BRYOZOA CANU AND BASSLER 43 



PORELLA RHOMBOIDALIS PARVIAPERTURA, n. var. 



Plate, 8, fig. I 



Description. — The aperture is small. There is a small round avicu- 

 larium supported on a flat wide lyrule. The separating threads of the 

 zooecia are very salient and thin. 



Measurements. — 



(hp = o.20 mm „ . fL^^ 0.80-0.85 "^i^i 

 Peristomicej^^^^^g ^^ Zooeciaj ^_^^^ ^^^ 



Number of zooecia in 4 mm'', 1 1 . 



Occurrence. — Balconibian beds at Muddy Creek, Victoria. 



Holotype.—V.S.N.M. no. 85841. 



PORELLA RHOMBOIDALIS CRASSIMARGINATA, n. var. 



Plate 8, fig. 2 



Description. — The aperture is smaller than in the type. The small 

 avicularium is borne on a flat lyrule. The separating threads of the 

 zooecia are little salient and very thick. 



Measurements. — 



fhp = 0.20 mm _ . rL^ = 0.80 mm 

 Penstomicej^^^^^^ mm Zooeciimij ^^^^^^.^^^^ „,„, 



Number of zooecia in 4 mm^ 10. 



Occurrence. — Balcombian beds at Muddy Creek, Victoria. 



Holotype.—U.S.N.M. no. 85844. 



PALMICELLARIA Alder, 1864 



PALMICELLARIA (?) MAGNA, n. sp. 



Plate 8, fig. 5 



Description. — The zoarium is free, very long, filiform, formed of 

 four longitudinal rows of zooecia opposed two by two. The zooecia 

 are distinct, separated by a small, little salient thread, very large, very 

 long, tubulose ; the frontal is very convex, fibrous and garnished 

 laterally with numerous small areolar pores. The peristome is very 

 long, oblique, rather salient, thin, with an inferior lip more developed 

 and convex ; the peristomice is large, semielliptical, transverse. An 

 oral avicularium with basal chamber large and globular opens laterally 

 on the interior of the peristomie. 



Measurements. — 



_ _ [hp = o.20 mm . rL.s= 1.75-2.00 mm 



Peristomice-< ,^ ^^ Zooecium-^ , 



1 Ip = 0.^0 mm 1 /ii: = o.5o mm 



Occurrence. — Janjukian beds at Anticline Creek, Dartmoor, 



Victoria. 



Cotypes.—U.S.^.M. no. 85818. 



