1 94 
normal pair, and also along the anterior pair of primary sagittal mesenteries (PI. V, fig. 7). 
Between the fertile part of the mesenteries and the mesenterial filaments the mesenteries are 
almost unchanged; here the mesogloea is somewhat broadened and it contains numerous oval 
or rounded connective tissue cells, with contracted plasma (PI. II, fig. 11). These cells are 
found also in the mesogloea near the mesenterial filaments and in the mesogloea of the 
interzooidal septum, but in the latter case they are not so very numerous. — The mesogloea 
of the mesenterial filaments contains the same cells (PI. II, fig. 8) before bifurcating. This 
branching is especially conspicuous in the lower part of the filaments along the sagittal mesen¬ 
teries. They contain a very large quantity of pigment, especially in the lateral parts. The 
peripheric part contains a few deeply staining glandcells; there are hyaline glandcells in the 
deeper layers of the ectoderm. Between the mesogloeal fork there is a granular nervous layer. 
The filaments are very much branched along the primary transversal mesenteries. 
The sections reveal also a remarkable mode of growth of polyps by budding, but not, 
as usually, in the interzooidal areas but on the oral cone (PI. V, figs. 1 and 2- textfigs. 257, 
258). On one and the same oral cone, limited by two large sagittal tentacles (PI. V, fig. 1) 
there are three oral slits, of subequal dimensions (fig. 1, at /, 2 and j). Each mouth has its 
own actinopharynx and its own system of mesenteries. There are eight lateral tentacles to be 
found, appertaining to this oral cone. Pour of them appertain to polyp / and four to polyp 2, 
while the third polyp has as yet no lateral tentacles. I can find no more than two sagittal 
tentacles, mentioned above. — On a little distance from this oral cone, there is a fourth mouth 
with actinopharynx and mesenteries, near the polypar limit. This young polyp has its own 
complete set of lateral and sagittal tentacles (fig. 257, 4). — The free borders of the actinopha- 
rynges of the young polyps are united, as will be seen from the pigmentated parts of PI. V, 
fig. 1. — In all these young polyps the mesenteries are fertile, especially the primary transversal 
mesenteries, which bear highly branched mesenterial filaments besides (PI. V, fig. 2, where the 
filaments of polyp / are figured). Polyp 2 also has ovaria in one pair of secondary mesenteries 
Fig. 257. Eucirripathes co?itorta v. Pesch. 
Arrangement of the young polyps (schema); /, j>, 4 
mouths of the young polyps; 2 mouth of the original 
polyp, to which both sagittal tentacles appertain (r.) 
and four lateral tentacles; 4 has a complete set of 
tentacles, 1 has lateral ones only (/) and j> none at all. 
Fig. 258. Eucirripathes contorta v. Pesch. 
Longitudinal musclefibres on the mesenteries of polyps 
I, 2 and 3 out of fig. 257 (for the text cf. the list of 
abbreviations before the plates). 
and since the ovaria in this polyp are the best developed, it gives the impression of being the 
oldest polyp, presumably the original polyp, to which the large sagittal tentacles belong, and 
on the sides of the oral cone of which the polyps / and j have originated, and polyp 4 
lurtheron on the bodywall. — The system of longitudinal musclefibres on the mesenteries is 
