BRYOZOA 2 3 



are unattached except by protoplasmic threads. The genus Bugula seems about equally well 

 represented in the two hémisphères. 



Habitat. — Exp. Antarct. Belge. 



N° 610, Tangles VIII. Lat. 70 00' S.- Long. 8o° 48' W. ; 5oo ? met. ; +0.9 C. 



N° 798, Tangles X. Lat. 70 i5' S.- Long. 84 06' W. ; 56g met.; +0.8 C. 



Bugula tricornis sp. nov. 



PL I, figs. ga-d; PL VIII, fig. 3) 



The zoaria are irregular in width, with hère and there three of four zoœcia in séries, 

 though usually there are onty two. The distal portion of the zoœcium is free. 



The zoœcia hâve three spines, the two situated at the corners of the zoœcia often 

 attaining to a considérable length, while the third, placed lower down on the outer border 

 and directed inwards, is shorter. Just below the area there is a small pediculate avicularium, 

 borne on a thin pedicel, and resembling the avicularium of B. reticulata B., to which this 

 and B. bicornis B. are closely allied and they seem to form a distinct group, in which the 

 distal rosette plates differ from what generally obtains in Bugula. The avicularia vary much 

 in size, and across the avicularian below the mandible there are two médian projections 

 (PI. VIII, fig. 3), which do not meet, but are the équivalents of the cross bar of so many 

 avicularia ; and a similar structure has been found in Beania magellanica B. The ovicells 

 are recumbent, broad, widely open with the surface smooth. The radicles start about the 

 middle of the side of the zoœcium from large projecting chambers. There are two large 

 latéral rosette plates near the proximal end, and the distal wall has two smaller plates. 



Habitat. — Exp. Antarct. Belge. 



N° 616, Tangles VIII. Lat. 70°oo'S.- Long. 8o° 48' W.; 5oo ? met. ; +0.9 C. 



Scrupocellaria funiculata (MacG.) 



(PL VIII, figs. i(7, b) 



Menipea funiculata MacGillivray, « Descr. New or Litlle Known Polyzoa », pt. IX. [Traits. Roy. Soc. Vicl., 

 vol. XXII, p. — 1 , pi. I. fig. 8; Zool Victoria, décade XVIII, p. 2S5, pi. 177, fig. 6.) 



There is a fragment, in a broken condition, from 877, which was almost concealed in 

 bundles of chitinous radicles ; but it has been possible, after cleaning, to make out that it 

 is a stout form, in one part multiserial, and there is as a rule one stout spine at the outer 

 corner, and a somewhat thinner one on each side rather lower down. In one zoœcium, 

 believed to be from near the base, there are two pairs of stout spinous processes and a 

 spine lower down on the outer side. The scutum has wavy bubble-like markings and, in 

 this respect, differs from typical Australian S. funiculata, which has only a central hollow 

 line. We are reminded of the scutum of Scrupocellaria obtecta Haswell, where however the 

 markings are in two branches. 



There is a small tiïangular avicularium below the area, rather to one side, and there 

 are latéral avicularia. Above the broken-down ovicells there is a pair of triangular avicularia. 

 The radicles start from near the base of the zoœcium, as in the typical form, and the only 

 différences are the markings on the scutum, and that the spines are not regularly three on 



