189 
the five other couples. The mesenteries of the second order are 
situated as usual in Peachia, in the lateral and ventrolateral exocoels, 
but do not consist of pairs but of single mesenteries. It is true 
that I have sectioned only one part of the specimen, but as this 
part is situated rather close to the tentacles, and as also in the 
undermost part of the 
body there are only 16 
longitudinal furrows pro- 
bably corresponding to 
the insertions of the 
mesenteries, and as the 
single mesenteries of 
the second order are 
well developed in the 
sectioned part, I think 
that the single mesen¬ 
teries have no partner 
also in other regions of 
the body. The muscle 
pennons below the ac- 
tinopharynx are not as 
much extended as for 
inst. in Peachia hastata, 
but somewhat more con- 
centrated and provided 
with high ramificated 
folds. The parietal part 
of the perfect mesen¬ 
teries consists of rather 
high folds arranged pallisade-like. In textfigure 7 I have re- 
produced a transverse section of a mesentery of the first couple 
and an imperfect lateral mesentery of second order. The muscle 
folds of the parietal part of the perfect mesenteries, as also the 
imperfect mesenteries, are often higher than shown in the figure. 
The imperfect mesenteries of the sixth couple are only slightly 
stronger than those of the second order. At least most of the 
perfect mesenteries inclusive the directives are provided with ovaries 
containing partly very large ova. 
Figs, 6—7. Peachia neozelanica. Fig. 6. Siphono- 
glyphe, conchula and directive tentacle. 
Fig. 7. Transverse section of mesenteries in the 
reproduction region (eompare the text). 
