Report on the Malacostraca, Pycnogonida and some Entomostraca. 519 



pace. The 4th and 5th abdominal segments almost equally long; 

 the epimeral plates on the 4th segment rounded, on the 5th segment 

 pointed. The 6th segment very nearly the same length as the 4th 

 and 5th together; on each side posteriorly it has a small tooth at 

 the root of the telson. The telson (fig. 20) almost as long as the 

 6th abdominal segment; the breadth decreases evenly towards the 

 point, where it is almost 2/3rds as broad as at the root. On the 

 lateral margin of the telson are 2 pairs of small spines; on the 

 slightly convex, posterior margin 4 pairs, the outermost pair quite 

 small; between the 2nd and 3rd pair (from the middle) a thin bristle, 

 between the 1st and 2nd pair two thin bristles. The eye (fig. 12) 

 large ; the facetted portion occupies almost the half of the whole 

 length of the eye (apart from the thin part of the stalk). 



In the 1st pair of antennæ (fig. 12) the endopodite is somewhat 

 shorter than the stalk and consists of 7 joints, which decrease in 

 length out towards the tip; the 4 proximal joints have signs of 

 articulation in the middle. The exopodite has proximally 6 thick 

 joints, which together are a little shorter than the endopodite, and 

 outermost 3 thin joints; the covering of setæ is seen in the figure. 



The squama (lig. 12) is oblong, with straight outer margin and 

 somewhat convex inner margin; in the middle where the breadth 

 is greatest this it almost l/6th of the length. The tip is rounded 

 and the dentiform projection does not reach quite so far forward as 

 the tip. The length of the flagellum cannot be given, as the tip is 

 wanting; but proximally it consists of a single, thick joint, then of a 

 series of very short joints, which are ca. 4 times as thick as long, 

 and distally of a thin part, the segments of which are as long or a 

 little longer than their thickness. 



The mandibles (fig. 13) have a palp and bilobed mastigatory 

 part. The front part, the cutting part, is a little bent and com- 

 pressed with 4 teeth. The molar process is a little longer than the 

 cutting part, almost cylindrical and along the edge has a number 

 of closely placed, dark-brown teeth, the series of Avhich is interrupted 

 in the under margin of the mandible. The palp almost as long as 

 the cutting part and with a constriction almost in the middle, so 

 that there is an indication of 2 joints. 



The 1st pair of maxillae (fig. 14) have the typical form with palp 

 and bilobed basal part. The form and setæ can be seen from the 

 figure, but it may be remarked, that the two points of the palp, 

 just as in the previously described stage of Spirontocaris groen- 

 landica, are not above one another but side by side. 



The 2nd pair of maxillae (fig. 15) have almost the same form 

 as in the stage A (fig. 5), but the hinder portion of the mastiga- 



37* 



