312 HYALONEMA (OONEMA) BIANCHORATUM PINULINA. 
Thickness | Maximum 
| of the thin- | thickness of 
| Length of distal ray nest partof| the distal | Length of the lateral rays 
Pinules Le the distal ray to- Bw 
ray nearits | gether with | 
base “| the spines 
limits average limits 7 limits limits average 
gastral 165-265 219.5 9-10.5 20-26 35-08 43.1 
from the 
upper and 
of middle- 170-250 211.2 7-10 21-23 30-50 38.7 
Picea parts of 
a the body 
2 dermal 
from the | 
eee ©! 130-330 | 234.5 9.17 30-65 40-80 | 56 
body 
gastral 120-280 214.2 feos 17-33 28-52 37.5 
from the 
upper and 
of middle- 180-266 217.9 8-10 20-26 32-60 | 40.1 
fj parts of 
a aig theiedy, 
dermal 
from the 
gay 150-305 | 240.7 10-16 35-65 35-62 | 48.5 
body 
end-parts, bears rather strongly inclined spines, which are slightly curved, 
concave to the ray. These spines attain their largest size at, or some distance 
above, the middle of the ray. Here the distal ray, together with the spines, 
attains a maximum thickness of 17-33 ». The lateral rays of the same spicule 
are usually equal, 28-60 » long, straight, cylindroconical, abruptly and bluntly 
pointed. They are smooth in their proximal part, and in their distal part are 
covered with rather sparse broad spines, usually up to about 1 » long. Some- 
times one ray is reduced in length, nearly cylindrical, and terminally rounded. 
Of hexactine forms (with a proximal ray) I have found (and measured) six, four 
of which were found among the gastral pinules of specimen a. The proximal 
ray is conical, pointed, covered with spines in its distal part, and 10-40 u long. 
The basal dermal pinules (Plate 82, figs. 21, 23-28, 34) are, like those above 
described, nearly always pentactine, very rarely hexactine. Their distal ray 
is straight, 130-330 » long, and spineless in its proximal part. It ends in a 
likewise spineless terminal cone. In these pinules the smooth proximal part is 
a 
