4] 
Special description. 
Schmidt has arranged his Genus Auletta with the Renieridae; but 
he states himself that this can only be preliminary. Why may it 
not be placed under the Chalineae? The specimen under description 
seems to be a true Auletta; at all events it belongs to the C'halineae. 
On the surface of this soft flexible Sponge, one observes the net- 
work of keratode-fibre; the latter being very well developed but 
not strong (fig. 20, pl. I). When the Sponge is cleft into two parts 
(ig. 158, pl. IV), the structure is to be seen very distinctly. The 
whole body, incl. the long pedicel is hollow. In this „gastral” 
cavity are the openings of the excurrent canals. The wall of the 
Sponge is pierced by ihe incurrent canals, which probably open out 
into ciliated chambers, and afterwards form the excurrent system. 
The oscular-opening is not quite on the top of the Sponge, but is 
a little beneath this, as is to be seen in the section in figure 158. 
In the keratode-fibres, which form the skeleton, the spicules 
are imbedded, which are all acuate: 
. tr. ac. (fig. 70, pl. III) more or less bent, but they have another 
shape as those of Schmidt’s Auletta sycinularia. 
21. Amorphina spec. [Pl. I, fig. 26]. 
Diagn. Spongia incrustans ; oscula in conis obtusis; spieula indican- 
ba: ac2. | 
Local. Barents-Sea. 
Depth. Unknown. 
Description. 
For the moment it is better not to give new names to Renieridae , 
unless one is very certain that the species is a new one. Without 
doubt many species of Reniera, Amorphina, Pellina ete. must be 
united. It is even uncertain whether these genera are really distinct. 
Our Sponge under description belongs to Amorphina, but many 
characters of Pellina can be applied to it. The family of the Renie- 
ridae requires a revision perhaps more than any other! 
The specimen from the Barents-Sea has a greyish-colour; the 
cones are pierced by a gastral tube, terminating in an osculum. 
