PALAEMON NEGLECTUS. 203 



rather little prominent (Fig. 4). The outer border of the 

 dactylus (Fig, 3) is thickly beset with similar spinules as 

 the outer border of the palm; they are wanting on the 

 rest of this finger and on the index, whereas here small 

 coarser teeth, similar to those of the inner border of the 

 palm, are observed, though in a smaller number. 



In Pal. neglectus, on the contrary, the outer border ot 

 the joints is, not rather thickly, beset with small, narrow, 

 sharp spinules (Fig. 6); these spinules are fully want- 

 ing on the inner border and on the adjacent parts 

 of the upper- and lower surface, whereas here much lar- 

 ger, prominent spinules are observed, rather few in 

 number and between which the joints are quite smooth. 

 These spinules on the inner border are much longer 

 than those of Pal. lar, and they have also a more, 

 slender form (Fig. 6). The smaller spinules of the outer 

 border of the palm are continued on to the outer border 

 of the dactylus, whereas on the lower surface of this finger 

 and on the free border of the index larger spinules occur. 

 In younger specimens the spinules are fewer in number 

 and less prominent. 



It appears to me probable that, in the adult male of 

 Pal. neglectus, the fingers of the 2nd pair of legs have 

 a different form than in Pal. lar : I say probable, because 

 only one adult male of this species has been examined 

 by me at present. The fingers of Pal. neglectus (vide de 

 Man, in: Max Weber's Zool. Ergebn. li, Tab. XXVI, 

 Fig. 37 6) taper rather regularly and the pointed 

 tip of the fixed finger is not strongly curved in- 

 ward. In adult male specimens of Pal. lar, lying before 

 me, the fingers hardly taper distally and the tip of the 

 fixed finger is strongly curved (Fig. 3). The toothing is 

 also different. In Pal. lar (Fig. 3) the fixed finger carries 

 a conical tooth not far from the articulation and, imme- 

 diately behind it, one observes a much smaller, more ob- 

 tuse prominence or tooth; in Pal. neglectus, the large 

 tooth at the end of the cutting-edge is placed farther 



Notes from the l^eyden JMuseum, Vol. XXVI. 



