l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



Family TUBUCELLARIIDAE Busk. 1884 



TUBITRABECULARIA Canu and Bassler, 1934 



TUBITRABECULARIA PRODITOR, n. sp. 



Plate 4, fig. 10 



Description. — The zoariuni is articulated ; the segments are large, 

 clavate, somewhat compressed at their extremity. The zooecia are in- 

 distinct, much elongated ; the frontal is convex, smooth, bordered by 

 large pores, and formed by an epicalcification hiding the peristomie 

 and supported by thin trabeculae radiating from the ascopore. The 

 peristomie (when visible) is long, oblique, much reduced, smooth, 

 tubular ; the peristomice is orbicular ; the peristome is thin, smooth, 

 sharp. The ascopore is small, tubular (when visible), placed at the 

 base of the peristomie. The ovicelled zooecia are globular, salient, 

 often grouped in variable numbers. 



Measurements. — 



. . r///' = o. 10 mm . {Lz — o.yo-o.'&o mm 



Fenstomicei ,^ Zooecuuni , . -.-. 



\lp — o.\o mm 1 /- = o.40 (?) mm 



Number of zooecia in i mm^, 5. 



Occurrence.- — -Balcombian beds at Muddy Creek, Victoria. 



Holotype.—V.S.^.^l. no. 85886. 



Family PETRALIIDAE Levinsen. 1909 



PETRALIELLA MacGillivray, 1887 



PETRALIELLA VULTUR AVICULIFERA, n. var. 



Plate 5. fig. 2 



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

 separated by a furrow, large, elongated, capitate ; the frontal is con- 

 vex and punctured by scattered pores. An avicularian umbo, very 

 salient, very long and somewhat oblique, is placed before the aperture ; 

 the mandible is very long and placed laterally. The aperture is large, 

 suborbicular, a little transverse ; a small expanded lyrule is placed on 

 the proximal border in the vicinity of two very short cardelles ; the 

 peristome is very thin, smooth, ornamented with four spines. On each 

 side of the aperture there is a small elliptical avicitlariiini, with pivot, 

 oriented proximally ; sporadically on the longer zooecia there are one 

 or two small elliptical avicularia with pivot oriented distally. 



