253 
more than twice as long as the outer. Mesenteries in 4 —5 cycles, 
the last cycle only in the proximal part. Monoecious. Embryos 
developing in an annular invagination around the column in its 
proximal half. Nematocysts of the column 10—12 x almost 1 — 1 //, 
those of the tentacles 12—18 x i —1,5 those of the actinopharynx 
17—22 X about 2,5 // and those of the acontia 14—19 x 1,5 —2 //. 
Spirocysts of the tentacles 13 x l—26 x 2— 2,5 /t. 
Colour. Column in general deep brown, sometimes greenish, 
blue or yellow. Oral disc iridiscent green, but the colour is very 
variable. Mouth pink or magenta with radial markings. The whole 
animal is iridescent (S tue key). 
Dimensions. Height and breadth 1,2 cm in extended State? 
(S tue key). In preserved State: 1) Height 1, breadth 0,9 cm. 
2) Height 0,7, breadth 0,6 cm. 
Occurrence. North Cape. 3.1.1915. Several specimens on 
Fucaceae. Cape Maria v. Dienien; on Fucaceae. 4.1.1915. 3 spec., 
Island Bay, Wellington. 22.1.1915. 1 spec. 
Further distribution in New Zealand. Island Bay, Ohiro Bay (teste 
Stuckey). 
Exterior aspect. The wide pedal disc is provided with a 
thin cuticle. The column is cylindrical to conical, smooth without 
cinelides, in certain stadia of contraction somewhat longitudinally 
folded. In many specimens there is a circular wall in the proximal 
half (figs. 50, 52; compare below). The margin is distinet. The ten¬ 
tacles are short, fine and smooth, placed at the margin and hexa- 
merously arranged 6 + 6+ 12 + 24 + 48 = 96, in large specimens 
the inner are more than twice as long as the outer. The greater 
part of the oral disc is devoid of tentacles. It is provided with 
radial furrows. The mouth is situated on a conus. The actinopharynx 
is well developed with longitudinal folds and provided with two rather 
distinet siphonoglyphes. 
Anatomical description. The ectoderm of the pedal disc 
is high, as is also that of the column. The latter seems to be provided 
with few giand cells and consists mostly of supporting cells; it con- 
tains very small nematocysts 10—12 x about 1 fi in size and is furn- 
ished with a very thin cuticle, mostly dropped. The mesogloea is 
thin, sometimes thicker, sometimes thinner than the ectoderm, ac- 
cording as the column is more or less contracted. It is fibrillous 
