Fic. 45. Qiuuictages' (1850) figure of N'octiliica seen tliiough the niitioscopc at 

 night, showing that the light comes from granules in the protoplasm. Quatrefages was 

 electetl a foreign member of the American Philosopliical Society in 1891. 



/'v - 



Fitj J 



Fir.. 4(). The hnninous osUacod crustacean. CApridina. about onc-eiglith indi long, 

 from the paper by Godeheu de Riville. " Memoire sur la Mer Luniineuse," in the 

 Mi'iuuires of the French Acadenn for 1760. \Vhene\er disturbed the animal s(|iiirts 

 a luminous secretion into the sea from glands near the mouth. Its swinnning legs 

 can be withdrawn luider a transparent shell when at rest, as sliown in fig. 1. Fig. 3 is 

 a dorsal view. This form lias been most \aluable for the chemical studies on light 

 production carried out In E. N. Har\e\ and his stuilents aiul colleagues o\er many 

 years. 



