DUTCH BORNEO-EXPEDITION. 73 



urogastric areolets are not contiguous, but separated ft'om 

 one another by an interspace almost as broad as the areo- 

 lets themselves. 



The upper surface of the carapace appears under a lens 

 very finely punctate, the punctation is rather close, some- 

 what less so on the cardiac and mesogastric areae than 

 elsewhere; on the front and behind the orbits the puncta 

 are coarser. The gastric region is quite anteriorly, as well 

 on the epigastric lobes as on the slope towards the post- 

 orbital furrow, distinctly wrinkled and foveate. 

 The lateral margin of the cephalothorax is covered, from 

 the epibranchial tooth till the posterior margin, with 

 oblique raised lines and is posteriorly slightly concave. 

 For the rest the surface of the cephalothorax appears 

 smooth and shining to the naked eye. 



The front is obliquely deflexed, the anterior border is 

 straight in the middle, or, as in the youngest male 

 and in the youngest female, very slightly concave. 

 In the type described by von Martens the free border is 

 a little curved upward, so that the upper surface of the 

 front appears slightly concave; this is also the case in the 

 youngest male, but in the other specimens not or scar- 

 cely so. The free border curves into the very oblique 

 inner somewhat raised portions of the upper orbital margins, 

 or the frontal angles are at least very obtuse 

 and rounded; the frontal margin measures about one 

 fourth the greatest width of the cephalothorax, — it is 

 somewhat difficult to measure exactly its breadth, — ac- 

 cording to von Martens, however, one third. The distance 

 between the free border of the front, near its outer angles, 

 and the epigastric lobes is scarcely half as long as the 

 former is broad. The front appears considerably broader 

 at its base than at its free border. 



The external orbital angles are moderately sharp and 

 reach as far or almost as far forwards as the free border 

 of the front, but not beyond it; the distance between 

 them measures three fourth or little more than 



JNotes from the Leyden JMuseum, Vol. XX.I. 



