LIMNOCODIUM IN THE UNITED STATES. 



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to the insertion of the base into the gelatinous margin of the bell, 

 believing them to be quite free. He does not state whether he 

 had studied this feature in sections, or from simply observing the 

 living specimens. 



On this point my specimens show considerable differences. In 

 the living condition, the larger tentacles, while capable of great 

 freedom of movement, are yet inserted in notch-like depressions 

 in the margin, as shown in Fig. 5. As studied in sections they 



Fig. 5. Portion of margin enlarged, showing tentacles, velar 

 canals and marginal bodies. 



show something of the condition figured by Giinther, though 

 very much less marked, the degree of adnation being much less 

 than in his description. Furthermore, I should not consider the 

 degree of fusion as having any very evident relation to the aspects 

 of the tentacles exhibited by the living medusae. On the con- 

 trary, the varying aspects of these organs under differing condi- 

 tions of activity or repose are such as to strongly suggest a very 

 different conclusion and interpretation. 



A further tentacular feature remains to be considered, namely, 

 that of structure. Both Allman and Lankester described the 

 tentacles as solid, though differing more or less from that 

 found in other medusae with solid tentacles. Giinther has later 

 shown that these conclusions were erroneous, and attributes 



