LOCOMOTION OF DENDRONOTUS GIGANTEUS. 265 



ducing each time a powerful stroke by the head, and forming in 

 the right or left side of the body-wall, according to the bend of the 

 head, a large twisted muscular wave which passes toward the poste- 

 rior. By the sweep of these waves locomotion is effected. Of all 

 known non-parapodic nudibranchs, Dcndronotus gigantcus is the 

 most able swimmer. 



2. Creeping is effected by direct rhythmic waves augmented by 

 ciliary action of the foot. 



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 Agersborg, H. P. Kjerschow. 

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'20 The Utilization of Echinoderms and of Gasteropod Mollusks. Amer- 

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 '21 Contribution to the Knowledge of the Nudibranchiate Mollusk, Melibe 



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*2ia On the Status of Chioraera Gould. Nautilus, 35, No. 2: 50-57. 

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} 22a Some Observations on Qualitative Chemical and Physical Stimulations 

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*22b A Critique on Professor Harold Heath's Chiorccra dalli, with Special 

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 '220 Gymnosomatous Pteropoda from Friday Harbor, Washington. Jour. 



Morph. (In press.) 

 Biedermann, W. 



'05 Studien zur vergleichenden Physiologie der peristaltischen Bewegungen. 

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'02 Des ondes musculaires, respiratoires et locomotrices, chez les Annelides 



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 Carlson, A. J. 



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