24 
the speeimen from the Barents-Expedition. It is irregular subglo- 
bose in form, with great and small elevations on the surface; the 
greatest diameter is about 13.5 c.m. The oscular tube is nearly 
cireular and measures about 14 m.m. in diameter, and 20 m.m. 
deep. The colour, the specimen being preserved in spirit, is now 
pink, here and there rather ochreous. 
b. Skeleton. The elements of the ordinary Greodine skeleton are 
the following. 
1°. ac? (f). Nearly all of the same length. Very frequent. Re- 
presented by Bowerbank *) in Fig. 2 on Plate XI. 
2°. ac®. Much smaller than the preceding spieules. BRepresented 
by Sollas in Fig. 10 on Plate XI, and by Bowerbank in Fig. 3 on 
Plate XI. It seems to me that they are always bent as in Sollas’ figure. 
3°, M. ta. d. bif. (Sollas, fig. 11, Pl. XI, Bowerbank fig. 4, 
Pl. XD). In the specimen from Hammerfest the secundary teeth 
(which I have designated by d') are nearly always shorter than the 
primary one’s. Compare my own representation on Pl. III, fig. 50. 
4°. M. ta. & 90°. The illustration of Sollas (l. e. fig. 8, Pl. XI) 
shows the whole spieulum. I have for that- reason only figured the 
head still more magnified (Pl. III, fig. 5l). It seems to me to be 
characteristice for the species, that the angle ® is rather great; the 
points of the teeth are thus far one from another. The shaft (M) 
is very slender. They are not very frequent. 
5°. M. ta. ©> 90°. Again these are rather rare; most of them 
are not peculiar forms, but modifications of the patento-ternates. 
6°. gl. The globates don’t offer any thing remarkable. 
7°. st. The stellates are small; only to be seen with great power. 
8°. glst. "There are yet very minute stellates or perhaps sphero- 
stellates, the true construction of which I could not see. It seems 
to me thai the illustrations of Sollas are not quite so as in our 
specimen from the Barents-Expedition; there at least the radii are 
yet shorter and not ceylindrical. But this difference can’t be of 
value for the species. 
*) Proc. Zool. Soc. 1872. 
