cells, also hyaline ones, and a few deeply staining- ones. There are very slightly developed 
circular musclefibres. In the mouth itself there is an accumulation of deeply staining gland- 
cells (the type of the nematocyst-batteries), but no lip is formed. In the lower part of the 
actinopharynx the ectoderm is very much folded. The mesogloea, 2 p. thick, suddenly 
increases to 5 p. at the free border of the actinopharynx. The entoderm (6 p.) is destitute 
of deeply staining glandcells. 
The mesenteries are normal, as far as they can be followed. There are no mesogloeal 
lamellae or musclefibres. The entoderm is 4 a, the mesogloea 1 tx. 
The mesenterial filaments are not visible. 
Reproductive organs. There are some testes, with a very thin mesogloeal capsule, 
oval in shape. The greatest diameter is 60 p„, the smallest 40 p.. •— They are not ripe. — 
We cannot make out their manner 'of origin. 
15. Euantipathes ericoides (M. Edw.). 
Tentacles. The ectoderm (33 p.) is papillose. On each papilla there is a large nema- 
tocyst-battery, surrounded by rather numerous, deeply staining glandcells, which are not to 
be found in other places of the ectoderm. The nervous layer is very near the mesogloea. 
There are no musclefibres. The mesogloea, varying from 3 — 17 p, from the top to the 
base of the tentacles, is homogeneous, except for very rare oval cells in some parts, while 
fibres, right across the mesogloea, we also very rarely meet with. — The mesogloea shows 
circular ridges on the entodermal side. The entoderm is almost entirely destitute of deeply 
staining glandcells. There are no musclefibres; its thickness (33 p.) is so great as to obliterate 
nearly the entire tentacular lumen. 
Bodywall. The entoderm is in its thinnest parts 6 p„, but the numerous nematocyst- 
batteries, with their surrounding of glandcells, give it a thickness of 23 p.. The entire structure 
is like that of the tentacular ectoderm. The mesogloea (5 p.) has oval cells sparingly distri¬ 
buted in its thicker parts, especially where the primary sagittal mesenteries are connected with 
the bodywall. Fibres across the mesogloea may sometimes be observed. The entoderm 
(8p.) is the same as in the tentacles. — There is no interzooidal septum. 
The oral cone, which is almost vertical, has a somewhat thicker ectoderm, especially 
near the mouth (15 p.). 
The axis has a wall of 40 p. with a lumen-diameter of 40 u. The spines are 70 p. long, 
so that repeatedly a fusion occurs between the axial sheath and the bodywall, but also with 
other parts i. a. with the primary transversal mesenteries, halfway between the bodywall and 
the free border, which bears the mesenterial filaments. The axis-ectoderm, with entodermal 
structure, is 3 p„ which increases to 7 p. at the base of the spines; the mesogloea is 1 p„, 
the ectoderm 3 p.. The connecting septum is double-funnelsnaped in section or triangular 
with its broad side towards the axis. — 
In its ectoderm (2 7p.) the actinopharynx has only actinopharyngeal glandcells. At 
the mouth the actinopharyngeal ectoderm extends outwards as a lip. Here and also in the 
