The skeleton is rather lax in the interiør, consisting of rather 
irregularly placed spicule-tracts; the external skeleton is, as said 
before, made up of cortically placed brushes of plagotriaenes so 
densely packed together, that they form a crust; the cladomes are 
placed just beneath the dermal membrane, which is sustained by 
a single layer of small spherasters; these latter together with the 
oxyasters also occur in great numbers in the interiør of the sponge. 
Spicules. 1. Plagotriaenes 
(Fig. 3 a); shaft stout, long conical, 
tapering evenly to a very sharp 
point, straight or a little curved; 
the cladi are placed obliquely to ^ 
the shaft; they are short, conical, 
Sharp pointed or blunt; shaft about 
2000—2500 X 80 fv at the base; 
the cladi are about 160 long, at 
the base just as thick as the shaft. 
2. Dichotriaenes (fig. 3b); of 
the same shape and dimensions as 
the plagotriaenes; the cladi often 
several times bifurcated. 3. Oxea 
(fig. 3 c); rather siender, fusiform, 
slightly bent at the middle, sharp- 
pointed, 2000—3000 x 52 /i^; they 
are mainly restricted to the interiør 
of the sponge, but may also part- 
take in the building up of the cortex, 
being intercalated between the plago¬ 
triaenes. 4. Oxyasters (fig. 3d); 
with rather few siender, sharp- 
pointed rays; no sphere; about 50/</ in greatest diameter. 5. Spher¬ 
asters (fig. 3e); with relatively big centra and short truncated rays, 
about 8 jLi in total diameter. 
Fig. 3. Slelletta sandalinuni nov. 
spec. a. Plagotriaene. b- Dicho¬ 
triaenes. c. Oxea. d. Oxyasters. e. 
Spheraster. 
.^ncorina alata, Dendy. 
Dendy (7), p. 298. PI. V, figs. 1—2; PI. VIII. figs. 1—7. 
We have this beautiful and well marked sponge from two loca- 
lities: New-Plymouth. 8 fathoms. Hard bottom. 12/1.1915. — North 
