/.,/. III. 



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Fig. 38. A luminous worm, often responsible for sea ligiit, reproduced 

 from the thesis of C. F. Adler, entitletl Xocliluca Marino (1752) . inuler the 

 auspices of Caroius Linnaeus, one of the hrsi foreign memljers of the Ameri- 

 can Philosophical Society, elected in 1770. 



Fir.. 39. \aiious earh drawings of the famous marine protozoan. Noiiiluca 

 miliaris, responsible for much of the hmiinescence of the sea. The organism 

 is \isible to the naked eye, about 0.8 mm. in diameter. The three in dish 

 at left are after Dicquemare (1775) ; two in center, after Slabber (1778) ; one 

 at right, after Macartney (1810). 



y^ y 



^ ♦ 



d 



^ . 4 



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Fi(.. 40. MiiuUc tlinollagellates. microscopic in size, recognized as the 

 source of the diffuse light of the sea about 1830. Reproduced from a plate 

 of (.. C. Ehrenberg's paper, "Das l.euchten des Meeres " (1834). 



