12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



very thin, filiform, salient ; the cryptocyst is shallow, flat, very finely 



granulated. The opesiuni is large, terminal, semielliptical, transverse ; 



the polypidian tuhe is long, oblique, smooth, very narrow, expanded 



distally. 



Mcasurcuients. — 



Diameter of polypidian tube, 0.12 mm 



Width of opesium, 0.40-0.45 mm 



. rL£r = o.85 mm 



Zooecium-^ , ^ 



I /£; = 0.45-0.50 mm 



Occurrence. — Balcombian beds at Muddy Creek, Victoria. 



Holotype.—U.S.lSiM. no. 85883. 



Family THALAMOPORELLIDAE Levinsen, 1902 



THALAMOPORELLA Hincks, 1887 



THALAMOPORELLA ELONGATA, n. sp. 



Plate 2, fig. 10 



Description. — The zoarium is bilamellar ; the fronds are narrow. 

 The zooecia are distinct, separated by their mural rim. much elongated, 

 narrow, subrectangular ; the mural rim is thin, rounded, salient, joined 

 to the peristome ; the cryptocyst is concave, rather deep, finely granu- 

 lated. The aperture is orbicular or a little transverse ; the peristome 

 is thin, salient. The opesiules are wide, short, placed in the neighbor- 

 hood of the aperture. 



Measurements. — 



r/;(; = 0.12-0.1 5 mm . rL.c" = 0.70-0.75 mm 



Apertura<^ , ^ " Zooeciumi , 



^ I /a = 0.1 5 mm I /£r = 0.25-0.30 mm 



Number of zooecia in 4 mm'', 21. 



Occurrence. — Janjukian beds at Mitchell River, Victoria. 



Holotypc.—Ll.S.N.M. no. 85897. 



Family ASPIDOSTOMATIDAE Jullien, 1888 



MACROPORA MacGillivray, 1895 



MACROPORA CLARKEI ATTENUATA, n. var. 



Plate 4, Hg. I 



Description. — The zooecia are separated by a furrow and not by a 

 salient thread. Our specimens bear kenozooecia analogous to those 

 figured by Waters, 1885. One of them bears traces of a broken ovicell. 



Occurrence. — Janjukian beds at Flinders, Victoria. 



Cotype.— U.S.N. M. no. 85781. 



