161 



The tlu-ee posterior legs are longer and slenderer tlian tliose of 

 L. adspersns and L. Squilla: tliose of the 3'^ pair reaeh in the 

 male to the anterior extremity of the antennal scales, but project 

 in the feraale with a part of their dactyli or sometimes even by 

 the whole dactylus beyond them, the legs of the 5*1^ pair, finally, 

 project in the male by the dactylus, sometimes only by half 

 this joint, beyond the antennal scales, while in the female the 

 dactylus or even a small portion of the propodus reaches beyond 

 the scaphocerites. 



Of an adult, ova-bearing female, long 72 mm., the merus proved 

 to be 9,2 mm. long and 0,8 mm. broad, 11-times as long as 

 broad, the carpus, measured from articulation to articulation, long 

 5,5 mm. and 0,84 mm. thick distally, the propodus 10,2 mm. 

 long and 0,56 mm. broad in the middle, 18-times as long as 

 broad; the dactylus, finally, 3,6 mm. long, measured one-third oï 

 the propodus. 



Eggs vcry numerous, 0,8 — 0,9 mm. long and 0,65 — 0,7 mm. 

 broad. As is proved by the coUections from the Ilollandsch Diep, 

 the female is provided with eggs in the month of May; in the 

 second half of January both the male and the female have al- 

 ready attained their fuU size, but ova-bearing specimens are still 

 wanting at that time of the year. 



The coUections from the river Sheldt near Antwerp which I 

 had the honour to receive from Prof. Gilson of Brussels, are 

 indeed interesting: these specimens are partly of medium size, 

 partly quite young, males and females, the latter, however without 

 eggs. The toothing formulae of 40 specimens are the foUowing: 



9 

 -.- one specimen. 



8+2 

 8 +2 



8 +1 



~ — one specimen. 



two specimens, 



eleven specimens, 



