240 
numerous above the collar. In all specimens there is namely a 
perspicuous collar at some distance from the tentacles as in Me- 
tridium. Whether this collar is formed by a contraction of the 
pennons in the lower part of the body, resulting in a small invag- 
ination of the upper part of the column in the lower, or the collar 
36 37 
Figs. 36, 37. Diadumene neozelanica. Fig. 36. Specimen from Kaipara. Magnif. ®/i. 
Fig. 37. Transverse section of pennon in the mesentery of first order. 
is visible also in not contracted specimens, it is difficult to decide 
in preserved specimens. The circumstance, that in two very expended 
and elongated specimens (the one specimen is figured in fig. 36) there 
was a low, but rather distinet wall in the same place as in the other 
more contracted specimen, possibly speaks for the presence of a real 
collar. Above the collar the column is broader towards the tent¬ 
acles at the same time as showing a tendency to be lobed. The 
cinelides are not visible in contracted State of the animal, but I 
have observed them in sections as well in the vicinity of the oral part 
