466 
Micvocionia pyramidalis nov. spec. 
(Fig. 21 a—d). 
Slipper Isl. The coast, at low water. 20/XII.1914. 
Encrusting as a 0,5 mm thick layer on a stone. Surface finely 
hispid; colour brownish. 
Skeleton in places consists of brushes formed by acanthostyles, 
but more frequently the acanthostyli are standing isolated with the 
base on the stratum of the sponge-attachment, and 
pointing vertically upwards; sometimes many styli 
are standing pretty close together, the biggest ones 
in the middle, thus expressing a certain tendency to 
build brushes; in this way the skeleton becomes 
much more irregular in appearance than in the other 
two just described Microcionia-spQcles. The tornota 
are scattered seemingly without order, but are rather 
abundant everywhere; the same is the case with 
the isochelae. 
Spicules. a. Megascleres. 1. Acanthostyli (fig. 
21 a—b), evenly tapering to the sharp points, a little 
curved; length varying from about 90 to 300 //, by 
a thickness of up to 11 //. The larger ones (com- 
monly about 260 p in length) are slightly spinous, 
and only in the first third; the smaller ones are 
comparatively coarser spined, and spined all over; 
every intermediate form occurs. 2. Tornota (fig. 
21c), smooth, nearly straight, ca. 160—170X4 p; 
they are the thickest in the middle, from here taper¬ 
ing evenly towards the one end, but only very little towards the 
other end, which is then conically set off, often a little head-like. 
Sometimes this end is blunt, so that the spicule is not to be dis- 
tinguished from styli in outer appearance. b. Microscleres. 3. Iso¬ 
chelae (fig. 21 d), wiih evenly curved shafts, short tooth and fim- 
briae, 16 — 30 p, often ca. 20 p. 
Anchinoé novae=zealandiae Dendy. 
Anchinoe novae-zealandiae. Dendy (7) pag. 360 PI. XII. fig. 2; PI. XV, 
figs. 9—11. 
Wellington Harbour. 5—10 fathoms. Hard bottom. 16/11.1915. 
Little Barrier Isl. 30 fathoms. Shell bottom. 29/XII.1914. Off New 
CL 
Fig. 21. Micro- 
cionia pyranii- 
dalis nov. spec. 
a. Big acantho- 
slyli. b. Small 
ncanthostylote. 
c. Tornota. rf. 
Isochele. 
