Smithsonian Report, 1 895 



Plate XXIV. 



4. — Section of the larval organ of Lampyra noctiluca. 



Ramifications of the tracheal tree; in the invagination of the upper part is the muscle; the 

 hypoderm is visible below and to the right. (A histological preparation reproduced by 

 photography.) 



6.— Section of the male organ (magnified 120 diameters). 

 a, a, a, a, cells of the adipose body; tr.trs.chea; m, muscular fascicle ; c, chalky or 

 radio-crystalline layer; g, free granulations; p, p, parenchymatous layei ; i, i, i, i, 



cells of the hypoderm. 



Physiological Light. 



