44 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



Family CELLEPORIDAE Busk, 1852 



COSTAZIA Neviani, 1895 



COSTAZIA CONVEXA, n. sp. 



Plate 8, fig. 10 



Hasiuellia producta (pars) MacGillivray, Trans. Roy. Soc. Victoria, vol. 4, 

 p. 137, pl- 14, figs. 17, 18 (not 16 and 20), 1895. 



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

 poorly oriented, separated by a deep furrow ; the frontal is very 

 convex, almost tubular, smooth, surrounded by areolar pores, termi- 

 nated by a mucron bearing an avicularium hiding a part of the aper- 

 tura. The apertura is elliptical, somewhat elongated, without cardelles. 

 The ovicell bears a perforated costulated area. The interzooecial avic- 

 ularia are large, spathulated, enlarged at the beak, directed toward 

 the base of the branches. 



Occurrence. — Balcombian beds at Muddy Creek, Victoria. 



Cotypcs.—U.S.'N.M. no. 85650. 



Family PHYLACTELLIDAE Canu and Bassler, 19 17 



PHYLACTELLA Hincks, 1880 



PHYLACTELLA CHAPMANI, n. sp. 



Plate 8, fig. 9 



Description.- — The zoarium incrusts shells. The zooecia are dis- 

 tinct, separated by a furrow, somewhat elongated, rather swollen ; the 

 frontal is convex, smooth in appearance but perforated by extremely 

 small pores and bordered by larger, more scattered pores. The aper- 

 ture is small, semielliptical, with two cardelles and a lyrule visible 

 only after suitably inclining the preparation ; the peristome is salient, 

 somewhat thick. The ovicell is recumbent, small, globular, smooth, 

 not closed by the operculum, opening in front of the oral mucron. 



Measurements. — 



{ha = o.oy mm _ . rL.c = 0.60-0.90 mm 

 Aperture-^ , Zooecia-,' , 



^ [ /a = 0.10 mm 1 fc = 0.50-0.75 mm 



Occurrence. — Balcombian beds at Muddy Creek and Janjukian beds 



at Torquay (bore, 160 feet deep), Victoria. 



Holotype.—U.S.^.U. nos. 85820, 85821. 



?' 



