5S EXPÉDITION ANTARCTIQUE BELGE 



truncatum, and Porina gracilis Ed. hâve wide tubes from the surface, and also from zoœcium 

 to zoœcium, but no distinct rosette plates. Haswellia has many similar characters, but has 

 a suboral pore, and a thick Schizoporellidan operculum. There seems to be most resemblance 

 to Tubucellaria, which however is jointed, though this is a character on which we should not 

 place much importance. The generic name is chosen on account of this resemblance. 



In 609 and 611 there are no polypides, but degenerate remains and many buds, also 

 ovaria in the zoœcia consisting of two or three rather large cells, situated b) r the latéral wall, 

 about half way between the two extremities. The walls of the compensation sac are visible. 



Habitat. — Exp. Antarct. Belge. 



N os 56o, 5g6, Tangles VII. Lat. 70 23' S.- Long. 82° 47' W. ; 4S0 met. ; -fo.8 C. 



N os 60g, 611, 619, 621, 623, 683, 691, Tangles VIII. Lat. 70" 00' S.- Long. 8o°48' W. ; 

 5oo ? met. ; +0.9 C. 



X" 743, Tangles IX. Lat. 70 20' S.- Long. 83° 23' W. ; 459 met. ; +0.8 C. 



This spécimen is nodulated (see fig. ië) and has a pronounced shelf on the distal end 

 of the oral aperture. 



N os 799, 1028, Tangles X. Lat. 70 i5' S.- Long. 84 06' W". ; 569 met. ; +0.8 C. 



Cellarinella nodulata sp. nov. 



(PI. VIII. figs. 6a-c 



The spécimen from 623 was at first thought tu be the nodulated variety of Cellarinella 

 foveolata nov., but there are important différences. 



The zoarium is erect, about 35 mm long and about 5 mm wide, it is somewhat compressed, 

 and at irregular intervais contracts, forming nodulations ; it is attached at the base by 

 chitinous radicles. Similar nodulations sometimes occur in Cellarinella foveolata nov. and 

 according to Bidexkap in both Myriozoum coarctum Sars and M. subgracile d'Orb. 



The zoœcia hâve large pits, distributed over the surface, and the outlines of the 

 zoœcia are not distinguishable; below the aperture there is a long striated projecting médian 

 mucro, much like that of Lepralia ocellata Hincks. At one side of the aperture is a trian- 

 gular avicularium with broad triangular mandible. 



Lepralia pachycera Reuss (Olig. Gaas, p. 471, pi. IV, fig. 1) has a similarly shaped 

 mucro and there are other species with strong mucros, as L. ceratomorpha Rss., L. monoceros Rss. 

 There are no polypides, but there are buds and the remains of polypides. The muscles 

 for closing the aperture are similar to those of C. foveolata. 



Habitat. — Exp. Antarct. Belge. 



N° 623, Tangles VIII, Lat. 70° 00' S.- Long. So°48' W. ; 5oo met.; +0.9 C. 



Cellarinella dubia sp. nov. 



PL YIII, figs. i2<7, b, and fig. 2 in text) 



Fragments were found in the cotton wool of one of the jars, and probably they were 



derived from 623, though this is not quite certain, as the jar also contained 3og and 591. 



Zoarium erect, compressed, with the two flatter surfaces slightly curved, and with 



