68 
THE VOYAGE OF H.M.S. CHALLENGER. 
4. Foveolaria, n. gen. 
Character. — Zoarium erect, branched and cylindrical, or foliaceons and bilaminar. 
Front of zooecia with a thick granular border very deeply imbedded in a pit formed by 
the thickening of the general ectocyst. A sessile avicularium immediately below or in 
front of the lower border of the pit. 
(l) Foveolaria elliptica, n. sp. (PI. XXIII. fig. 5). 
Character . — Zoarium slender, composed of cylindrical forked branches. Front of 
zooecia oval or broadly elliptical, border very wide, oral valve occupying rather more than 
the upper half of the membranous front. Ooecia large, prominent, subglobose, 
obscurely punctate. Avicularium horizontal, the mandible pointing obliquely to one side. 
Hohitat. — Station 162, off East Moncoeur Island, Bass Strait, 38 fathoms, sand and 
shells. Station 320, lat. 37° 17' S., long. 53° 52' W., 600 fathoms, green sand. 
(2) Foveolaria orbicularis, n. sp. (PI. XXIII. fig. 4). 
Character . — Zoarium irregularly branched, branches cylindrical, sometimes inosculat- 
ing, and very irregular in thickness and direction. Zooecia short. Front orbicular, 
border rounded, granular ; a partial internal lamina, in which is a central elliptical trans- 
verse aperture. Median avicularium of small size, with a triangular mandible pointing 
in various directions. 
Habitat. — Station 147, lat. 46° 16' S., long. 48° 27' E., 1600 fathoms, Diatom 
ooze. 
In this species, as in Myriozoum truncatum, the openings of the zooecia remain 
patent only at the very extremities of the branches ; elsewhere they are completely 
obliterated, the only openings seen on the almost uniformly smooth surface of the 
branches being those belonging to the avicularia, which would appear to be left 
functionally efficient long after the obliteration of the zooecia themselves. 
(3) Foveolaria tubigera, n. sp. (PI. XIV. fig. 4). 
Character . — Zoarium foliaceous, biflustridan in aspect. Zooecia completely immersed, 
entirely membranous in front, with a rather thin granular border, broadly oval, slightly 
constricted about one-third down. General surface entire, smooth. Median avicularium 
prominent, with an acute mandible or pointed beak, directed horizontally to one side. 
