1 last the “suckers“, which usually should be present in the type- 
J species it remains to decide their nature. The term suckers has 
i namely been used for several very different formations (compare 
\ p. 213). Are they perhaps elevated cinclides? Before the nature 
; of the “suckers" and the size of the nematocysts in the acontia 
' have been examined, it is difficult to decide, whether Diadumene 
; and Aiptasiomorpha are different genera or not. 
*' Diadumene neozelanica n. sp. 
^ Diagn osis. Column smooth. Collar very distinet in contracted 
j State of the column. Margin somewhat undulated. Tentacles 160 
1 to about 200 (or more) cylindrical, the inner considerably longer 
j than the outer. Tentacles distributed over the greater part of the 
j oral disc. Actinopharynx long with 2 siphonoglyphes well devel- 
oped and with aboral prolongations. 6 or a few more pairs of 
mesenteries perfeet. Well developed diffuse longitudinal muscle 
I pennons on the perfeet and stronger imperfeet mesenteries. Parieto- 
I basilar and basilar muscles weak. Nematocysts of the column 12 — 
19X(2,5) 3 — ( 3 , 5 ) lii, those of the tentacles partly (17) 19—29 x 
almost 3—4 (5) p, partly 15— 19 X 1,5 (2) p, those of the actino¬ 
pharynx partly 22—29 (34)X3 — 3,5 p, partly 24—26 x l ,5 — al¬ 
most 2 p, those of the acontia partly 46—70X5—6 p, partly 13 
, —17X1,5 partly 17—19X2,5—3 p. 
Colour? 
Dimensions in preserved, rather contracted State: Largest 
; specimen from Kaipara: length 2 cm, breadth 1,3 cm, that from 
! Slipper Island, length: 1,5 cm, diameter of the column a short 
i distance from the pedal disc 0,6—0,8 cm, diameter of the oral 
disc 0,7 cm, length of the inner tentacles about 0,3 cm. Smallest 
* specimen : height of the column 0,7 cm, breadth of the pedal disc 
0,5 cm. 
Occurrence. Slipper Island, low water, together with Thoé 
j vagrans. 20.12.1914. 3 specimens. 
Kaipara, on conglomerates of sand. 8.1.1915. Several spec¬ 
imens. 
Exterior aspect. The pedal disc is well developed, of almost 
the same breadth as the oral disc. The column is smooth with 
* indistinet longitudinal furrows, which are more distinet and more 
