24 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



very frequently the base of a very large transverse avicularium with 



spathulate pivot in which the beak is supported on the peristome of an 



adjacent zooecium. 



Measurements. — 



r//a = 0.1 2 mm (including 



' 1 /a = 0.1 2 mm oral sinus) ^t ^ 



^ ^ . ' rLfr = 0.65 mm 



Zooecium X , 



1 /2' = 0.40-0.55 mm 



Number of zooecia in 4 mnr, 16. 



Occurrence. — Balcombian beds at jMuddy Creek, Victoria. 



Holotype.—U.S.^M. no. 85885. 



DAKARIA Jullien, 1903 

 DAKARIA CRASSOCIRCA, n. sp. 



Plate 6, fig. 7 



Description. — The zoarium is free, cylindrical, formed by four longi- 

 tudinal rows of zooecia. The zooecia are distinct, separated by a 

 furrow, at the bottom of which is a salient thread, elongated, elliptical ; 

 the frontal is very convex and covered with large infundibuliform 

 tremopores. The aperture is transverse, semielliptical ; the proximal 

 border bears a very wide rounded sinus ; the peristome is complete, 

 very thick; between the inner proximal portion and the aperture, there 

 is a small armature of little depth and characteristic of the genus. 

 Ovicell unknown. 



Measurements. — 



r//a = 0.1 2 mm . rLrr = o.84 mm 



Aperture-^ , ^^^ Zooecium- , _ ^^ 



i 1 /a = 0.1 5 mm 1 /- = o.55 mm 



Occurrence. — Janjukian beds at Bairnsdale, Victoria. 



//0/0/y/'^.— U.S.N.M. no. 85683. 



SCHIZOBRACHIELLA Canu and Bassler, 1920 

 SCHIZOBRACHIELLA HEXAGONALIS, n. sp. 



Plate 6, fig. 5 



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

 distinct, separated by a salient thread, hexagonal, somewhat elongated ; 

 the frontal is convex and formed of a tremocyst with small, numer- 

 ous pores. The aperture, orbicular in aspect, is formed by a large 

 semicircular anter and by a concave poster notched by a wide, shal- 

 low sinus separated from the anter by two small lateral indentations. 

 Laterally, at the height of the apertural sinus there is either a longi- 

 tudinal slit or a small elongated avicularium. 



