418 IRURJÖSIPISID IE, SPO NES 
In order with certainty to decide if one of the above-mentioned 
species may be identical with one described before, typical 
specimens are, at least in most cases, required for comparison. 
Only when specimens of these three genera have been the ob- 
jects of a very careful and minute examination in the hand of 
an able spongiologist, there can be any possibility of explaining 
these genera. Before this is done I shall give new specific 
names to some of the forms. 
Genus Cribrochalina 0. 8. 
Cribrochalina variabilis Vosm ee r. 
Plate 26 
Cribrochalina variabilis, Vosme&er, Report on the Sponges dredged up in 
the Aretic Sea by the » Willem Barents> in the 
vears 1878 and 1879 (in Niederl. Archiv fär Zool., 
Supplementb. I, 1882, pag. 36, Plate 1, fig. 16—17, 
Plate 3, fig. 67—69, and Plate 4, fig. 145—147). 
This species is represented by several fine and large spe- 
cimens, much varying in size and shape. Most of them re- 
semble those which are figured by Vosmer. I have not 
separated all the forms as distinct varieties, because I have 
found in our collection many transitions between the two 
varieties, described by Vosmeer. All the specimens are in a 
very good condition and preserved in spirit. Colour greyish. 
The sponge is generally infundibuliform; I have seen only 
one specimen which was compressed, cake-like and deprived 
of the stem. The oscula are congregated mn the upperteom: 
caved part of the infundibulum. There is no difference in 
colour between the pedicle or stem and the body. Some spe- 
cimens are cylindrical, the diameter of the body of the sponge 
often not much greater than that of the stem. "The spicules 
agree well with those described and figured by Vosmer. 
Most specimens are attached to stones and other hard objects. 
The largest specimen is infundibuliform, 80 mm in height, and 
90 mm in diameter at the margin of the funnel. The cylindrical 
specimens have a diameter of about 5 mm. The consistency is 
very soft and flexible. 
Habitat. Between Stolbovoi-island and Liakov-island, depth 
12 fathoms (51 V.); S. E. from Liakov-island, depth 8—9 fath. 
