32 EXPEDITION ANTARCTIQUE BELGE 



Habitat. — Station i35fl. Tristan d'Acunha, 70 fathoms (120 met.) (Challenger). Cape 

 Horn on seaweeds &c. 



Exp. Antarct. Belge. 



N° 3g2, Eel trap I. Lat. 71° i5' S.- Long. 87 3g' W. ; 436 met. ; — 0.2 C. 

 X" 570 on stones 5g6 on shell, Tangles VIL Lat. 70 23' S.- Long. S2°47' W. ; 480 met.; 

 +0.8 C. 



N° 6S3, Tangles VIII. Lat. 70 00' S.- Long. 8o° 48' W. ; 5oo ? met. ; -fo.g C. 



Membranipora uniserialis sp. nov. 



(pi. 11, fig. 2 



Zoarium creeping, uniserial, with new branches arising from the side of a zoœcium. 

 The zoœcium is somewhat pyriform, expanding in the upper part, and contracted at the 

 proximal end to a narrow stalk, the flat elliptical area on the front is surrounded by a raised 

 ridge. Just below the ridge of this area, at the distal end, there are three or four spines 

 on each side, and in the upper part of this area there is an unsymmetrieal opesial opening, 

 which is rounded at the distal end and contracts near the middle, while the proximal edge 

 is diagonal. There are two pore chambers on each side and une distal one. The ovicell is 

 nearly as broad as the zoœcium with a short keel in the front. 



This species is abundant upon some stones brought back by the Expédition, but the 

 spines are not always présent, nor is the shape ol the opesium always the same, through the 

 diagonal position is gênerai, being horizontal only in a few zoœcia. I hâve only seen the 

 one complète ovicell of which I made a sketch at the time, and when preparing the plate 

 could not meet with the perfect ovicell again, however, there are a few broken down ovicells. 



Habitat. — Exp. Antarct. Belge. 



X" 288, Dredge I. Lat. 7i°og' S.- Long. 8g° i5' W. ; 460 met. ; +o.3 C. 



X° 3ga, Eel trap I. Lat. 71" i5' S.- Long. 87 3g' W. ; 435 met. ; — o.3 C. 



N os 570, 5g6, Tangles VIL Lat. 70" 23' S.- Long. 82" 47' W. ; 480 met. ; +0.8 C. 



Membranipora strigosa sp. nov. 



(pi. 11, fig. 4) 



The zoœcia are large, oval or nearly round, somewhat irregular. The walls are thin, 

 sloping outwards, smooth, and the small ovicells hâve an area with minute pores. This is 

 a very simple for m, without anv avicularia, and in gênerai appearance much resembles the 

 M. madlenta of Jullien, found off Spain, and which I consider is the same as a Membranipora 

 from Franz Josef Land. 



The spécimen is growing upon a stone, and the polypides are visible, but the material 

 is not sufficient for sections. 



Habitat. — Exped. Antarct. Belge. 



N° 745, Tangles IX. Lat. 70 20' S.- Long. 83° 23' W. ; 45g met. ; +0.8 C. 



