283 
cauline wall is as a rule in different extension firmly connected with 
the stems and branches. A complete diaphragm is as a rule 
de\eloped. Nematopbores are never present. Au operculum is 
always piesent. consisting of 1—4 opercular membranes or valves 
fixed in eorresponding sinuations of the margin. [A conical proboscis]. 
Of the characters named in the above diagnosis I have put 
that which concerns the form of the proboscis in parenthesis, as 
I have only been able to verify it myself in rather few forms, the 
proboscis being a structure, the form of which can only be examined 
with advantage in well-preserved material. I am not sure, therefore, 
that it really presents so sharp contrasts that the Campanulariidae 
by the aid of the above named character can be sharply divided 
from the three other related families. According to A liman 1 ) 
and H i n c k s") we have to discern between two forms of proboscis. 
a conical , present in the large majority of the Hydroid families, 
and a “trumpet-shaped” which has only been found in the Euden- 
driidae and the Campanulariidae. While Hincks in the diagnosis 
of the latter family calls the proboscis “trumpet-shaped”, in the 
diagnosis of the genus li Campanularia ’ he speaks about a “cup¬ 
shaped” proboscis, and as these two terms therefore must be 
synonymous, it is evident that Hincks when he uses the expression 
“trumpet-shaped” especially thinks of the expanded end of a 
tiumpet. Ihe two latter terms, however, are very unlucky and 
misleading, as every proboscis in its expanded state is “cup-shaped” 
or “trumpet-shaped”, while at the other side the proboscis of Eu- 
dendrium, Campanularia and Laomedea is “club-shaped” or bulbi- 
form, not only according to my own examination of well-preserved 
material, but also according to figures given by A liman and 
Hincks. In well-preserved specimens of Sertularella tricuspidata 
and Halecium muricatum , lately brought home from Greenland, I 
have found that the expanded proboscis is “cup-shaped” while it 
is conical in its contracted state, and when Hartlaub 3 ) in his 
work on Sertularella says about the proboscis of this genus: “Die 
’) 1 a. 
2 ) 22. ») 19, p. 12. 
