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quantity on a lower level, so that the free actinopharyngeal border is sometimes almost black. — 
On a higher level the pigment diminishes in quantity, it may be found on the highest level 
along the places of attachment of the primary transversal mesenteries. This pigment lies in 
longitudinal rows in the epithelial cells. — Usually the musclefibres are absent, but in some 
cases I saw indications of an ectodermal musclesystem of longitudinal fibres. 
In some species the actinopharyngeal ectoderm curves outwards at the mouth so as to 
form a lip of the same structure ; this lip may have its greatest breadth on its distal side. -—• 
The mesogloea is -very thin; it may form high lamellae, which make the ectodermal folds 
project far into the actinopharyngeal lumen, especially in its lower parts. Usually the meso¬ 
gloea is thicker at the places, where the mesenteries join. The mesogloea may contain oval 
cells and fibres but very rarely. — The entoderm contains very few glandcells; a muscle- 
system of circular fibres may be - developed but without a special sphincter. — The actino- 
pharynx is entirely absent in Sibopathes gephura. 
Mesenteries. The normal number of ten mesenteries shows deviations in the sub-genus 
Ezicirripathes. While most of the Eucirripathes- species have ten mesenteries, I find an extra 
* 
pair of secondary mesenteries in Eucirr. contorta. This extra pair is not found, as in Schultze’s 
Dodekamerota, between the anterior secondary mesenteries and the primary transversal pair, but 
between these secondaries and the anterior primary sagittal pair. This sixth pair is not found in 
the highest part of the coral cone, which here shows in cross-section the normal aspect of all 
the other species. — The course of the other mesenteries is very regular; usually they are 
flat and straight, except the primary transversal mesenteries, which may be convoluted and 
sinuous. The primary mesenteries descend deepest; the polypar border is reached by the primary 
transversal pair only. Usually the secondary mesenteries descend much less deeply. — Often I 
saw the secondary mesenteries descend deepest at the side of the body wall, and leave the actino- 
pharynx at a higher level, in contrast with earlier observations. In Eucirr. contorta the sixth 
pair of secondaries does not even reach the actinopharynx at all! In Schizopathes ajjinis none of 
the mesenteries (also none of the primary ones) does reach the actinopharynx! — On the contrary 
I saw the secondary mesenteries descend deepest on the actinopharyngeal side in several species, 
somewhat less in number, but the fact is certain ; in these cases the mesogloea of the mesen¬ 
teries was thicker on the side of the actinopharynx, while in the other cases this layer was 
thickest on the side of the bodywall. There are also species where both ways of joining are 
found in the same polyp. — The description, following beneath, of the course of the secondary 
mesenteries in their lower half, is also an argument for the deeper attachment on the actino¬ 
pharyngeal side, but in the main I should say that the secondary mesenteries descend deepest 
on the side of the bodywall. — One species shows fusions between some of the mesenteries 
and folds of the actinopharynx; even one of the secondary mesenteries is found between two 
such folds in the higher part of the oral cone, and it is entirely absent in the highest part; 
some other species show the same fact for the lower part of these mesenteries, which may 
even fuse with the primary transversal mesenteries. 
The mesogloea of the mesenteries is homogeneous but in one species it contains stellate 
connective tissue cells. 
