AND OTHER BRITISH PRAWNS. 



107 



the eye, the second usually slightly in front of the orbital notch. 

 The dorsal teeth differ slightly from those of L. longirostris and 

 L. squilla in being more depressed. 



3Iandiblepalp. — Three-jointed, the second joint about one-third 

 the length of the last joint. 



Antennule. — The shorter ramus exceeds the length of the 

 peduncle, and is "fused" to the longer fiagellum by only about 

 one-third of its length. The length of the free part is a very 

 noticeable character of the species. There are certain minor 



Text-figure 2. 



Antennule of female. 



A. L. longirostris, drawn from moulted skin. 



B. i. longirostris. C. L. adspersus. D. L. squilla. E. P. varians. 



differences in the structure of the peduncle between the species of 

 Leander and Palcemo7ietes. These relate to the proportional 

 length of the joints and the form of the stylocerite and terminal 

 plate, but they are less easily described than illustrated. In text- 

 fig. 2 the antennules of the different species are drawn side by 

 side to such scales that the peduncle is represented as of the same 

 length in each case. The proportions of the joints and of the 

 flagella are in this way made clear. 



Second leg. — Extends beyond the antennal scales by the 



