42 
The water enters the Sponge by means of thousands of pores, vi- 
sible over the whole outer-surface; the watercanals end all in the 
central gastral tube. 
The spicula are only of one kind viz. acerate (ac?.) 
22. Tedania suctoria O. 8. [Pl. T, fig. 24; pl. III, figg. 88—88]. 
Diagn. Corpus basi in lapidibus haerens. Superficies cum multis 
papülis obtusis. Spieula indicantia: tr°. | tr. ac. | ac?|. 
Loc. Lat. 72° 32',3 N. ; long. 36° 39',5 E. (BarentsSea) [July 15, 1879]. 
Geogr. distrib. Iceland (Schmidt). 
Depth. 128 Fathoms. 
Literature. 
1870. Schmidt, Spong. Atlant. Geb. pag. 43. Tab. V, fig. 11.. 
1881. Ridley, Proc. Zool. Soc. pag. 125. 
Special description. 
This Sponge, represented in figure 24 Pl. I, seems to differ 
in shape and in the arrangement of the spieules from Schmidt’s 
speeimen. The curious papillae however and the characteristic 
Tedania-needles (tr°?.), show the close affinity. Schmidt has given 
no illustrations of the spicules. The forms I found in the speci- 
men from the Barents-Sea are: 
1°. tr. (fig. 88). The heads are often elongated as f. ex. in 
fig. 86. Other specimens have heads as in fig. 84. This figure 
shows that both ends have not always equal heads (tr°. tr°.) and 
that the shaft can be subfusiform. The iype is very kegneul: 
2°. tr. ac. (fig. 87) thin and slender. 
3°. tr. ac. (fig. 85) thick and stout. Just beneath the head often 
a little eonstrietion is often visible, and transitions are formed to 
(tr°.) ac. They are about three times longer and four times thicker 
than the preceding ones. 
4°. ac?. (fig. 83). They have about the same diameter and length 
as the thin tr. ac. (in fig. 87). 
23. Alebion piceum n. sp. [Pl. I, fig. 19; pl. III, figg. 75—82]. 
Diagn. Corpus infundibuliforme, piceum. Spieula indicantia : tr. ac. sp. | 
(tr°.) ac. |'tr®%. sp. f. | ane. anc.'| rut. rut | DO. 'NB. | 
