Notes on Myriapoda. + 
closely parallel to the alimentary canal and might, on 
lighting, look as though the luminosity came from the gut. 
He suggests that if the luminosity occurs within the glands 
or their reservoirs, without excretion, then the fairly thin 
chitinous exoskeleton would let the light shine through it. 
Verhoeff accompanies his description of this phenomenon 
with two text-figures of the sternal glands which occur in 
most Geophilomorphs (figs. 4 and 5), and refers the reader 
Chetechelyne vesuviana. 
Fig. 4.—Sternal gland-group as figured by- Verhoeff, (12) p. 312, after 
Duboseq. , the disk which opens on to the pore-field ; @, anterior ; 
p, posterior elements; J, suspensory attachment, J. W. Smith & 
8. G. B.-B. phot.-del. 
Fig. 5.--An isolated cell from the gland-group, x 900, as figured by 
Verhoeff, (12) p. 312, after Duboscq. xy, nucleus of the cell; 
r, cell-network ; na, nucleus of the eland-alveolus ; fm, muscle-fibre. 
J. W. Smith & 8. G. B.-B. phot.-del. 
to his plate v. figs. 6, 7, & 9 (this last is our fig. 3), while 
in a footnote, adding a remark that the cause of luminosity 
is unknown, he mentions bacteria again as a possible cause, 
and also quotes Gadeau de Kerville’s opinion that an ex- 
clusively chemico-physical incidence may be a more or less 
sufficient explanation. He also points out that it is not at 
all clear why one species illuminates and others nearly 
related do not. 
We must next direct attention to a paper by Gazagnaire 
(10), with which Verhoeff does not appear to have been 
