16 
an osculum is breaking out, or where there has been one. Between 
the greater ones there are perhaps also broken or beginning roots. 
But not all the elevations can represent roots, for they are visible 
on opposite sides. 
OÖ. F. Müller has given an illustration of a Sponge that he enti- 
tles Aleyonium ceranium !). I have no doubt that this in an Geodine- 
Sponge; and even I think there is reason to believe that it is an 
Isops, perhaps I/sops sphaeroides. Müller does not speak of spieu- 
les, of course; for that reason it cannot be certain if it isidentical. 
7. 1sops pallida n. sp. [Pl. L, figg. 9 and 15; Pl. II, 
figg. 22—26, figg. 29—38; Pl. IV fig. 117]. 
Diagn. Corpus ellipsoideum vel piriforme, suepe cum radicium exor- 
düs. Spicula indicantia: ac? (f) | tr’. ac | M. ta. = 90° | 
M. ta. @< 90° | gl. | st. sp. | glst.-| 
Local. Lat. 71°12’5N.; long. 20° 305 E. [neighborhood of Ham- 
merfest]. (July 2, 1879). | 
Depth. 135 Fathoms. 
Special description. 
a. External character. 
Both varieties of this Sponge are more or less elongated, pear- 
shaped and have a faint-yellow colour. 'The surface is nearly even. 
In the var. «. the oscula are simply apertures of the „cortical 
layer”, in the var. 8. they are surrounded by a wall. I have re-_ 
presented this Sponge (var. 8) in fig. 9 Pl. I; the greater number 
of the oscula are on the top, but they are also to be seen on the 
lower parts. Some of the oscula posses walls, other ones are destitute 
of them; besides this there are to be seen many transitions from the 
fully developed ones to the simple apertures of the var. x. Characte- 
ristic for our var. 8. are the beginnings of roots (figg. 9 and 15, 
Pl. I). The var. «. was about 6 c.m. long and 4 c.m. broad (grea- 
test diameter), the var. 8. being only 4 c.m. long and 28 m.m. broad 
(greatest diameter). 
1) Zoologia Danica Vol. Ill. Tab. LXXXV. 
Dre 
