414 FRISTEDT, SPONGES. 
The obtuse spicules (Plate 23, fig. 3—4). These spicules are 
slightly curved, sometimes inflated at the centre, and all are 
microspined at the obtuse terminations. Very numerous. 
The large acerate spicules (Plate 23, fig. 1) are a little greater 
than those of Hyalonema rosea. "They are also very numerous: 
The spinulate spicules. "The spicules of this kind have a 
greater head than those of the preceding species, but in 
other respects they agree well with those of H. rosea. They 
are not numerous, though not as rare as in H. rosea. The 
length of all these three kinds of spicules is about the same 
as in H. rosea. 
The large hex(quinque)radiate spicuwles (Plate 23, fig. 12). 
These spicules are very few in number and very often quite 
smooth, exceedingly rarely microspined at the sharply pointed 
ends. 'The rays are slightly curved, one being much longer 
than the others, but of the same diameter. The length of the 
largest ray is 2,8 mm. The shortest ray is about 14 min 
Tlensth. 
The larger microspined hexradiate spicules (Plate 23, fig. 13) 
differ from the smaller spicules of the same kind by their 
rays, which are all well developed in the greater kind. Five 
of the rays are 0,2 mm in length, the sixth being about 0,1. mm. 
All the rays are microspined, straight, and more or less obtu- 
sely pointed. | 
The smaller microspined hexradiate spicules (Plate 23, fig. 14). 
In these spicules only five rays are well developed; the sixth is 
very minute and obtuse, while the others are obtusely pointed 
as in the larger hexradiate microspined spicules. All the rays 
are straight and microspined, the length of the well-developed 
ones being 0,1 mm, of the minute ray only 0,02 mm; this ray 
is of the same diameter as the others. 
The rosettes with sharply pointed branches (Plate 23, fig. 17) re- 
semble a little the rosettes of H. rosea, figured Plate 23, fig. 10. 
Here we have also a thick central cross, every branche termi- 
nating in two slender, smooth, slightly curved and sharp-pointed 
arms. The size from the centre of the cross to the point of an 
arm is about 0,08 mm. 
