21 
Local. Lat. 71° 12'5N.; long. 20° 30'5 E. (neighborhood of Ham- 
merfest) 1879. 
Depth. 135 Fathoms. 
Special description. 
a. External character. 
There are dredged up two specimens; one measures 12 c.m. in 
height, its greatest diameter being 10 c.m. (Pl. IV, Fig. 154.) The 
other specimen is more irregular in form. In both specimens the 
depression on the top measures about 7 c.m. in diameter but is 
only 1.5 c.m. deep. The oscula possess more developed walls as 
Isops Phlegraei Soll. and other species. The colour is pale ochreous 
in one specimen, more pinkish in another. On the lower parts 
there are little roots. 
b. Skeleton. 
The cortical layer of globates is rather thin; it is the thickest 
on the lower parts, where it gives off the roots. The bundles of 
long-shaped spieules take their origin in the centrum, as it is in 
nearly all Geodidae. The elements of this skeleton show much 
resemblance with those of Bowerbank’s Pachymatisma areolata '), 
but can’t be included in this species. I have found the following 
kinds of spicules. n 
4°. ac? and ac? (f). There are at least three kinds of acerates. 
In the first place very slender and sharp pointed ones (fig. 53, 
Pl. II). The second form is represented in fig. 52. "The most curi- 
ous however is that of the thicker spieules, more fusiform than 
the slender ones, but in every case characteristice by the teat- 
shaped end (fig. 56, Pl. II). Between these great acerates there 
are also small sharp pointed spicules, as are found characteristie 
for the Renierinae or Chalineae (fig. 57, Pl. III). 
2°, tr. We see in fig. 55 a specimen of an acerate spicule with 
teat-shaped head, that forms a transition to the totally blunt spi- 
cules, tr?. (fig. 54, Pl. III). There is another Sponge of this fa- 
mily, that possesses such spieules, viz. Pachymatisma areolata of 
1) Bowerbank 1872. l. c. pag. 630. 
