428 ERISDPEDI,; SPONG ES: 
Skeleton. The skeleton consists of only one kind of 
spicules, viz. acuate. 
The acuate spicules (Plate 24, fig. 14) are perfectly smooth, 
tapering from the round base to the sharp point. They are 
generally slightly curved near the base. The length is 0,3 mm. 
The spicules are, as in Isodictya infundibuliformis, con- 
gregated in a net-work more or less regular. 
Colour. The larger of the two specimens is ash-grey, the 
smaller yellowish-light, both are preserved in spirit. 
Habitat. Greenland, Baffin Bay, Lat. 75” 26 N., Long. 67 
2T W., depth 260 fathoms (542 5.) 
VI, Suberitidina 0. 5. 
Genus Suberites Nardo. 
Suberites montalbidus Carter. 
Suberites montalbidus, Carter, Ann. and Mag. of Nat. Hist., ser. 5, vol. 6, 
pag. 256. 
Subertites montalbidus, Fristedt, Bidrag till kännedomen om de vid Sve- 
riges vestra kust lefvande Spongize, Kongl. Svenska 
Vet.-Akad. Handlingar, Bd 21, N:o 6, pag. 19 mana: 
fig. 4 a—4 e. 
Suberites spec., Vosme&r, Report on the sponges dredged up in the arctic 
sea by the »Willem Barents» in the years 1878 and 
1579 (Mm Nied” Areh: oo) Stå pp Lott page Tse kate 
fig. 22—23, Plate 4, fig. 140—144). 
In the collection of sponges, obtained during the Swedish 
arctic expeditions conducted by Prof. A. E. Nordenskiöld 
there are several specimens of this species. All agree very well 
with Suberites spec., deseribed by Vosmeer. The spicules are: 
1) acuate, transient to spinulate, 2) misrospined inflato-acerate, 
and 3) microspined inflato-obtuse (— inflato-cylindrical Bow., 
Mon. TI). 
At my first examination of specimens of Suberites montalbidus 
Carter from the west-coast of Sweden, I could not find the 
spination of the small inflato-acerate and obtuse spicules; the 
