30 Notes on Myriapoda. 
EXPLANATION OF THE PLATES. 
PratE I. 
Fig. 6. “ The Electric Centipede.” An early Victorian idea of the appear- 
ance of a phosphorescent Chilopod, being fig. 3756 in Charles 
Knight’s ‘ Pictorial Museum of Animated Nature,’ vol. ii, 
(c. 1840). 
Fig. 7. Holder for microscopic examination of luminous centipedes. 
S. G. B.-B. del. 
fiy. 8. Apparatus arranged for the examination of luminous centipedes. 
A, flexible wire from positive terminal of coil direct to the 
distant strip of foil in the holder; B, wires from negative ter- 
minal of coil to push and from push to the near strip of foil 
in the holder; C, bull’s-eye condenser ; A, holder in position on 
the stage of the microscope; s, supports, on the left for wire L, 
on the right for the bull’s-eye condenser. J. W. Smith phot. 
Fg. 9, Microphotograph of several segments of Geophilus curpophagus, 
to show the appearance of the “ white glands” before discharge ; 
they are seen as cloudy white masses beneath the sternal and 
episternal plates. The highly illuminated parts of the chitinous 
exoskeleton stand out as white lines and patches, the posterior 
limit of the sternal plate is seen as a practically straight white 
line, its anterior edge is marked by two rather finer white lines 
which fail to meet in the middle line. Compare with PI. IL. 
fig. 11. J. W. Smith microphot. 
Fiy. 10. Photograph of a drawing to illustrate the appearance of the 
ventral surfaces of four segments of Geophilus carpephagus as 
seen in the durk when viewed under the microscope imme- 
diately after electrical stimulation (see description in the text). 
H. K. B.-B. & 8. G. B.-B. del. J. W. Smith & 8. G. B.-B. 
phot. 
Prater 
Figs. 11,12. Geophilus carpophagus, $ , Darwen, collected 9th July, 1919. 
Drawings of the same (? thirty-third) segment, x 40, made two 
days after capture. Tig. 11 before, fig. 12 after electrical stimu- 
lation and phosphorescence. In this instance three glands only 
were undischarged by the stimulus. H. K. B.-B. del. 
Fiy. 18. The appearence of luminosity as recorded by photographic film, 
This result was obtained by the method described in the text, 
the animal being secured on the back of the film and lumines- 
cence stimulated by pressure, x 3. J. W. Smith & 8. G, L.-B. 
phot. 
