4 CONRAD FRISTEDT. [SEC. ARCT. EXP. FRAM 
The acerate spicules are very long, and generally straight, though 
occasionally slightly curved. 
According to Bowerbank (Brit. Spongiade, Vol. IV) the geographical 
distribution of this sponge is Greenland, Spitsbergen, Norway, the Faroe 
Islands, Newfoundland, the Great Belt and Heligoland. (There is no 
calcispongia from the west coast of Greenland in the state zoological 
museum in Stockholm.) I was at first inclined to believe that this 
sponge might be a new species, on account of the very small number 
of quadriradiate spicules, or possibly a variable form of Ascandra 
mirabilis Fristept (Sponges from the Atlantic and Arctic Oceans and 
the Behring Sea, p. 406, pl. 22, figs. 3—13, pl. 26, figs. 1&2), but the 
absence of the smaller acerate spicules (loc. cit. figs. 5 & 6), and the 
great resemblance to Sycandra ciliata, H. induced me to identify this 
species with the above-mentioned S. ciliata. 
Chalina Grant. 
Chalina limbata Bow. 
Spongia limbata Monracu (Vern. Mem. IJ, 111, pl. 15, 
figs. 2 & 3). 
Chalina limbata Bowerbank (Monograph Brit. Spongiade I, 
p. 378). 
There are two specimens of this species in the collection from Elles- 
mere Land, probably two fragments of one specimen. The larger of the 
two pieces is about 40 mm. in length, and 22 mm. in breadth, the thick- 
ness being 20 mm. It is furnished with only one osculum, the diameter 
of which is 3 mm. The smaller of the specimens has two oscula, both 
of which measure 2 mm. in diameter. The consistency of the sponge 
is exceedingly soft. The surface is slightly hispid, owing to the pro- 
jection of the dermal spicules. The dermal membrane is very thin and 
pellucid. The sarcode is rather abundant, and of a brown colour. The 
pores are scattered all over the surface. 
The colour of the sponge, both when preserved in spirit and when 
dry, is light brown. 
The skeleton consists of spiculous fibres. The spicules of the softer 
membranes and the fibres are similar; namely, acerate, slightly curved 
and short-pointed. There are very few acuate spicules. 
The above-described specimens agree fairly well with Bowerbank’s 
description of Chalina limbata Bow., but the fibres of the specimens 
