Smithsonian Report, 1895. 



Plate XXV. 



m m. m. 



7.— Terminal portion of the body of the female Lampyra noctiluca (enlarged 



7 diameters). 

 S, ultimate segment; ov, OV. ovaries inclosing eggs; or'.OJ' 2 ) O)* 3 , photogenic or- 

 gans of the female; tr,tr, tracheae; g, ganglionic chain drawn forward; m, m, 

 m, m, muscular fascicles. 



or' -e .c 



or 3 



8.— Female organs as in or 1 and or 2 , fig. 7 (enlarged 10 diameters). 

 me, me, me, vie, meatuses; gr, gr, granulations; e, separation be- 

 tween the chalky and parenchymatous layers; c, C, C, C, cells in files. 

 (The chalky layer covers the paienchymatous layer). 



-Pholas dactylus, opened so as to show the cords c, c, and the luminous triangles, t, t. 



Physiological Light. 



