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somites. Before long I hope in a full paper to work out this theme 
with drawings and plastic reconstructions. In this preliminary com- 
munication I will confine myself to describing the forming of distinct 
somites in the head of Teleosts, independent of the entoderm and 
entirely analogue with the myotomes of the trunk, and to showing 
the signification of the connection-piece as a simple prolongation of 
the chorda. 
Before ending I beg to be allowed to give some more data on the 
structure and the development of the infundibulum in the Muraenoids. 
The description of the structure of the infundibular organ I gave in 
the ,Anatomischer Anzeiger”, after further examination appeared to 
be perfectly true. The big cells I described in the infundibulum of 
Muraenoid embryos, with a protoplasmic conical protuberance and a 
crown of small vesicles on it, I could distinguish with great clear- 
ness in the living larvae. The crown of small vesicles showed itself 
with the same regularity as in the stained sections, they were standing 
on a distinct protoplasmic conus and the whole complex was sharply 
bounded off from the other parts of the brain. What I had concluded 
already from peculiar aiterations of the form of the cells, viz. that 
the protoplasmic conus was able to alter its form, I could confirm 
by studying the living embryos. Several times I saw one of the big 
sensory cells prolong its protoplasmic conus and draw it back again. 
In no case I saw one of the small vesicles fall off or lying free in 
the lumen of the infundibulum. 
In my first communication I had overlooked the description of the 
infundibular gland by SrUDNICKA in his paper on the ependym, 
published last year. He described the same crown of smill vesicles 
on the cells of the infundibular gland in different fishes (Selachians, 
Teleosts, Ganoids), and takes them for a product of the secretion 
of the gland cells. From my description and from the fact, that they 
develop out of cilia, which I could state by studying the interme- 
diate stages, it seems to me to follow, that this conclusion cannot 
be the right one, and that we have to see in the saccus vasculosus 
not a gland, but a sense-organ. For adult anguillae I could confirm 
the statements of Srupnicka. But here too, the small vesicles are 
sitting on distinct ,Basalkérperchen”, and continue in the cell as a 
bundle of thin but distinct fibres. In all the embryos of Teleosts I 
studied in this direction (Hippocampus, Syngnathus acus, Clupea spp., 
Uranoscopus, Mullus barbatus, Lepidopus caudatus, Scorpaena scrofa, 
Fierasfer acus) the same structure of the saccus vasculosus was to 
be seen. 
As to the function of the infundibular organ, it seems to me 
