420 FRISTEDT, SPONGES. 
Skeleton. The skeleton consists of only acerate spicules. 
The acerate spicules (Plate 24, fig. 1). "These spicules are, as 
usual, slightly curved, sharp-pointed, 0,2 mm in length. Part 
of them are disposed in nets; the fibres are feebly developed 
and multispiculated. With regard to the thickness there are 
two kinds of acerate spicules, the proportion of the thickness 
1 :2; the length is the same im both. 
Colour. Dried and preserved in spirit, yellowish. 
Habitat. Norskö, depth 15—25 fathoms (14 Sp.); Mossel Bay, 
20 fathoms (96 Sp-) 
Reniera ventilabrum n. sp. 
Plate 24 fig, blate 20 more 
This very fine sponge is represented by one specimen, 
broken in three pieces. "This Rentera is ventilabriform, and as 
to the outer shape it agrees with JIsodictya infundibuliformis L. 
(Bow.). The surface is even, perforated by frequent minute 
oscula. The length of the restorated specimen is about 170 mm, 
the breadth about the same, and the thickness 3—4 mm. The 
margins are slightly attenuated and rounded. "The fibres, 
radiating from the middle of the blade, are arcuated towards 
the surfaces. These fibres are multispiculated and connected 
with spicules disposed in nets. The consistency is rather 
fragile. 
Skeleton. As a true Remera this new species has only 
one kind of spicules, viz. acerate. 
The acerate spicules (Plate 24, fig. 3) are generally straight, 
rarely curved, sharp-pointed, with a length of 0,25 mm. 
Colour. Brownish with a tint of yellow in the specimen 
preserved in spirit; a little dried piece of the same is slightly 
lighter in colour. 
Habitat. Lat. 79? 55 N., Long. 10? 27 E., depth 280 fathoms 
(286 Sp-). 
