nurCH BORNEO-EXPEDITION. 63 



with the upper margin of the orbits; the distance between 

 these two obtuse angles, i.e. the width of the front, mea- 

 sures a little less than a third of the greatest 

 breadth of the cephalothorax. 



The distance between the outer angles of the orbits is 

 little more than half the greatest width ; these angles are 

 dentiform, but small and not very conspicuous. The finely 

 granulated supra-orbital margin is tumid, well delimited 

 from the carapace, with two distinct grooves near the 

 outer angle. The orbits are almost circular, scarcely broad- 

 er than high. Immediately below the outer angle there 

 is a small triangular groove or gap; the lower margin of 

 the orbits is concave in the middle and both its inner 

 and its outer angle are dentiform, the former being larger 

 and projecting more forward than the latter. This external 

 lobe or angle of the infra-orbital margin (Fig. 2« and 2*) 

 is a little larger than the extra-orbital angle and a little 

 more prominent. 



The fairly sharp, finely granular antero-lateral margin 

 of the carapace is about as long as the postero-lateral and 

 divided into four teeth, the first three of which are broad 

 and anteriorly acuminate, the last narrow and carinated ; 

 these teeth are, however, lower and less pro- 

 minent than in Menippe Panope Herbst, as Hilgendorf 

 writes. The distance (1^/2 mm.) between the outer angle 

 of the orbit and the tip of the first antero-lateral tooth 

 measures three fourth the distance between the tips of the 

 two first teeth and this latter measures two thirds of the 

 distance between the tips of the second and third tooth ; 

 the tip of the third tooth finally is still slightly more 

 distant from the fourth than from the antepenultimate. 

 The four first teeth therefore, including the extra-orbital 

 angle, gradually increase in length. The outer margin of 

 the penultimate tooth runs backward and slightly inward, 

 so that the cephalothorax presents its greatest width at 

 ■the tips of these teeth ; the last tooth is carinated above 

 and the ridge that gradually diverges from the postero- 



Notes from tlae Leyden M-usexitn, Vol. XXI. 



