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Anatomical description. The ectoderm of the column is 
high and contains numerous mucus cells. At the insertion of the 
ectoderm at the mesogloea there is on transversal sections a row 
of small refractive bodies, much more delicate than the transversally 
sectioned muscles in the mesenteries; whether we really have to do 
with ectodermal muscles here I cannot decide with certainty, but I 
am more inclined to regard these bodies as the somewhat thickened 
bases of the supporting cells. The mesogloea is in every part almost 
homogeneous,with sparse cells. A distinet, rather long, diffuse sphineter 
is'developed, forming rather high folds in its uppermost part (textfig. 1). 
Stuckey has not observed any sphineter. Below the sphineter the 
circular muscles form very short folds or none. The tentacles and 
the actinopharynx show the typical structure in Corynactis. 
The number of mesenteries varies a little. In two sectioned 
specimens there were 35 resp. 41 pairs. In a third specimen, the 
tentacles of which I have counted, the number of pairs was pro- 
bably 40, as there were 40 rows of endocoel-tentacles. This number 
agrees with Farquhar’s statement, while Stuckey States that 
there are in all species (compare the synonyms!) 24 pairs of me* 
senteries. I think that Stuckey has generalized too much in 
this case, at also when he says that there were typically 12 pairs 
perfeet. It is a well known faet that the mesenterial arrangement 
