XO. 9 TERTIARY BRYOZOA CANU AND BASSLER 9 



Division COILOSTEGA Levinsen, 1909 



Family OPESIULTDAE JuUien. 1888 



RECTONYCHOCELLA Canu and Bassler, 1912 



RECTONYCHOCELLA (?) DIMORPHOCELLA, n. sp. 



Plate 2, fig. 6 



Description. — The zoarium is bilamellar. The ordinary zooecia are 

 distinct, separated by a furrow of Httle depth, elongated, ogival. The 

 mural rim is little distinct and is confused with the cryptocyst; the 

 latter is smaller than the opesium, concave in its vicinity, somewhat 

 convex proximally, slightly granular ; the opesium is terminal, large, 

 pyriform, narrowed toward the top by two small lateral condyles 

 symmetrically placed. The accessory zooecia are membraniporoid ; the 

 elliptical opesium is surrounded by a rounded salient mural rim. 



Measurements. — 



r//o = 0.35-0.40 mm „ . rL£' = 0.65-0.80 mm 

 Opesiumj ^^^^^^ ^^^^^ Zooecumij i^^^^^^.^^^o mm 



Number of zooecia in 4 mm", 12. 



Occurrence. — Balcombian beds at Muddy Creek. Victoria. 



Holotype.— U.S.N. M. no. 85854. 



FLORIDINELLA Canu and Bassler, 1917 

 FLORIDINELLA AUSTRALIENSIS, n. sp. 



Plate I, fig. 6 



Description. — The zoarium is free, bilamellar ; the fronds are nar- 

 row and bear on each face four longitudinal rows of cells. The zooecia 

 are distinct, separated by their common mural rim, elongated, ogival, 

 much narrowed proximally. The mural rim is thin, salient, rounded ; 

 the cryptocyst is large, shallow, concave, smooth; the opesium is 

 terminal, elongated, semielliptical, with the proximal border straight 

 or concave ; two small distal condyles, symmetrically arranged, slightly 

 contract the opesium. 



Measurements. — 



r/jo = 0.25-0.28 mm . rL.c- = 0.60-0.70 mm 



^^^'^"^[10=0.17-0.19 mm Zooecumij ;^. ^ ^ _^o-o.43 n,m 



Occurrence.— Balcomhian beds at Muddy Creek, X^ictoria. 



Holotype.— v. S.N. M. no. 85722. 



