368 Dr. F. Meinert on the Campodez, 
mandibles do, but are almost entirely retracted into the head, 
this centre of motion is supplied by a pair of conical protube- 
rances (fig. 1 £) on the inner surface of the skull near the back 
Fig. 1. 
aa, mandibles ; 8, chitinous plate; 
e, principal flexor of mandible; 
d, tensor of mandible; e, muscles 
which keep the mandibles in place ; 
J, second pair of flexors of mandi- 
bles; g h, muscles steadying, pro- 
truding, and retracting chitinous 
plate; 7, labrum; k, protuberances 
serving as pivots for mandibles. 
a 6 c, principal parts of inner 
framework on one side; d, inner 
lobe of maxilla (the lamellz omit- 
ted); e, outer lobe of maxilla; 
f, palpus; g, palpiger; 4, lingua; 
i, paraglosse; k, stipes of maxilla; 
I, cardo maxille; m n, retracting 
and protruding muscles of frame- 
work, 
of the head, against which the pointed basal ends of the mandi- 
bles are pressed when the flexors contract, and which then serve 
them as pivots. The drawing will explain this arrangement 
more clearly ; only it is to be observed that the mandibles have 
been brought out of their ordinary position and slipped away 
from the protuberances just mentioned. 
The maxille are connected with the lingua, and, together 
with the latter and the paraglosse, supported by a peculiar in- 
ternal framework (fig. 2 abc) of thin chitinous pieces, of which 
the construction will appear more fully from figure 3. The 
most prominent part of the maxilla is the inner lobe (fig. 2d), 
which is more strongly chitinized than the other parts, hooked 
or sickle-shaped, and carries on its concave inward edge five 
curved, deeply subdivided smaller lobes or lamellz. The inner 
maxillary lobe is supported by the stipes (fig. 2 4), which is to- 
lerably firm, elongated, and flat. From the basal extremity of 
the stipes a thin chitinous piece can be traced (fig. 27), con- ' 
necting it with the outer branch of the framework just men- © 
