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The mandibles. 
On the exterior side of the 1st joint behind the 
apophysis an irregular group of c. 17, partly middle- 
sized, partly very short, rather oblique longitudinal 
fissures (Tab. II, fig. 2). On the interior side behind 
the apophysis a similar groupwith c. 15 fissures. Besides 
several very short fissures spread about on the surface 
of the joint. 
The cephalothoracie shield. 
A small number of mostly very short fissures, going 
in different directions, spread round about. 
Sternum anterius. 
With very few spread, very short fissures. 
Sternum posterius. 
With but a couple of short oblique fissures towards 
the front. 
Abdomen. 
All here mentioned fissures are short, having, how- 
ewer, a very great mutual difference according to 
length. The 12th segment and the telson are to be treated 
at last. 
Ventral side. 
lst sternite with a small number of very small 
fissures, going in different directions and spread over tne 
surface. 
2d sternite. Some spread transverse fissures, 
almost all in the proximity of the posterior margin 
and chiefly out towards the sides; wery few, indeed, 
towards the centre of the plate. 
dd and 4th sternite. c. 14 transverse fissures 
on each half along the posterior margin, a couple along 
the lateral margin and some spread over the surface of 
the plate. 
5th, 6th, 7th and 8th sternite almost like the 
4th, having, however, not more than c. 18 or 11 trans- 
