2 I I 
There are no parasites to be seen. 
As to the growth of the colonv, I found a young polyp between two adult ones; 
only the sagittal tentacles were present, but the lateral ones were absent. The oral cone was 
well developed and the mouth was formed. The actinopharynx was also normally developed, 
as well as the primary mesenteries and the mesenterial filaments. It could not be decided 
with certainty, whether the secondary mesenteries were absent, but it seemed to me that this 
was the case. — There were no testes in the transversal mesenteries. 
Specimens of the other stations showed the following divergations. The specimen of 
station 164 has in its ectoderm (which is not very well preserved) of bodywall and tentacles 
no nematocyst-batteries apparently, while there are narrow, homogeneous, deeply staining gland- 
cells to a small number; large parts of the ectoderm are entirely destitute of them. The 
mesogloea is very thick, max. 60 y. (!) with some rare cells, but without fibres; in the body- 
wall the mesogloea is 30 y. thick and 33 y. in the oral cone. The actinopharyngeal ectoderm 
is 70 y. thick and its mesogloea 5 y., which is a great deal for an actinopharynx. The mesen¬ 
terial filaments are straight and not branched. 
One of the five specimens of station Kur, described on p. 60 after the type-specimens, 
has got its nervous layer not so deep in the ectoderm; there may be a very slightly developed 
layer of musclefibres in the tentacular ectoderm. Their mesogloea is thinner: 3 y. in the ten¬ 
tacles and bodywall, 6 y. in the oral cone. The entoderm of the tentacles has also a few slight 
musclefibres. The ectoderm of the oral cone has nematocyst-batteries and a greater number of 
glandcells than the bodywall. The axis-wall is 16 y., while the lumen-diameter is also 16 y. or 
slightly more (the sections are made through a top-part of both colonies); the epithelial layers 
are resp. 10,1 and 10 y. thick. — There are slightly developed longitudinal musclefibres in the 
actinopharyngeal ectoderm. The secondary mesenteries are inserted on a somewhat lower level 
on the actinopharyngeal side than on the side of the bodywall. The mesenterial filaments are 
short and straight along the sagittal mesenteries and unbranched, but convoluted, along the 
transversal mesenteries. The thickness of the mesenteries (7 y.) increases to 33 y. near the 
filaments, diminishes suddenly into a short, narrow stalk, inserted in the concave side of the 
kidney-shaped filament, the greatest breadth of which is 60 y. (cf. PI. IV, fig. 1). Near the 
polypar limits the transversal mesenteries are without filaments, but the free border is broadened 
with a swollen mesogloea as in PI. I, fig. 10. —- The specimen of station 794has the same 
anatomical structure as the here-described polyps, but they are not so very well preserved. 
Of the other specimens of station 250 (Kur) one 1 ) has only a very small number of 
deeply staining glandcells in the tentacular ectoderm so that the nematocyst-batteries for the 
greater part have no envelope of glandcells, while the other specimen out of the same bottle 
has often locally a great number of these glandcells. The nervous layer is well separated from 
the mesogloea. There are no longitudinal musclefibres in the tentacular ectoderm, or only very 
slightly developed ones. There is an interzooidal septum to be found. 1 he spines are club-shaped 
with an extension of the axial lumen in their base so that it is obvious that they have originated 
1) One of both colonies, which precede in the systematic description the other 5 colonies, on p. 59. 
