4 De & the Rev. 8. Graham Brade-Birks— 
pore-field. Similar openings are sometimes visible on the 
episternal plates before and behind the legs (2 8 and 2¥). 
Internally Geophilomorphs present the characteristic 
features of the arthropod body, little but the integumentary 
glands calling for special notice here. These glands are not 
easy to study and our knowledge of them is, as yet, imper- 
fect. Verhoeff (12), pp. 33 e¢ seqq., has dealt with them in a 
passage which we have translated as follows :— 
“Sternal glands occur in most Geophilids*, but there is 
great variety in their arrangement. Sometimes, and most 
frequently, they are present as isolated glands, sometimes 
they are found in loose clusters, sometimes in dense groups. 
In the last case their openings. form a pore-field, which 
generally lies in the middle of the sternite and is sometimes 
surrounded by a chitinous border. When the pores and 
glands are arranged in a dense group, scattered glands often 
occur too. ‘The loose clusters are not infrequently found in 
pairs posteriorly, and often in two pairs in the four corners 
as well. Nor is the distribution of the sternal glands by any 
means always the same on all the ventral plates of one 
species ; much more usually a great. difference is noticeable 
between the anterio-posterior parts and the middle. Some- 
times only the most anterior of the sternal plates have gland- 
groups (Schendyla, as a rule), and less usually only those of 
the posterior end of the body have them. More frequently 
it happens that a band-like group of glands is found on the 
anterior segments at the posterior edges of the ventral plates 
(Geophilus, in some cases), and in those imstances there is a 
division of the giands into twe parts in the case of the plates 
of the mid-trunk, and perhaps in those of the posterior 
segments too. The isolated glands of the ventral plate 
empty independently to the outside. ‘These cells are 
distinctly elongate and have the nucleus in the region of the 
inner end, ‘Their contraction is caused by muscle-fibres 
(plate v. fig. 9, fm.t), which are placed around the isolated 
glands and may ramify and exhibit transverse striations 
(Duboseq). The glandular fluid #s of very varying colour : 
in Himantarium gabrielis it is rose-red, so that if anything 
irritates an individual of this species it becomes covered on 
the ventral surface with a row of rose-red droplets. In 
other Geophilids, e.g. Chetechelyne, the finid is more watery 
and clear. Moreover, it is these ventral glands which cause 
the phosphorescence of certain Geophilids, but it has, of 
* I. e., Geophilomorphs, similarly, in some other places in this review. 
+ This is reproduced as our fig. 3, g. v: 
