﻿THE GENUS LEIOGNATHUS, CN. (GAMASIDAE). 



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The very large hook-shaped spur which is present on the second coxa is the 

 most noticeable feature of the species described above. It is also characterised 

 by the shape of the scutum and other plates of the body, the number and 

 arrangement of the setae of the scutum, the shape of the peritreme, etc. 



Leiognathus liberiensis, sp. nov. (fig. 2). 



Body much less elongated than that of L. creightoni, sp. nov., and much wider 

 behind than in front. There are no long hairs at the posterior end of the body, 

 all the hairs being short. Scutum undivided ; in shape it is rather like that of 

 L. creightoni, but is narrower ; the hairs on its surface are very minute. Ventral 

 surface. Sternal plate large and furnished with three pairs of long fine setae. 

 The shield which is situated behind the genital operculum bears a pair of fine 



Fig. 2. — Leioc/nathus liberiensis, Hirst, $ , ventral aspect. 



and fairly long setae. Anal plate pear-shaped, its posterior end is finely striated 

 and is blunter than that of L. creightoni ; as usual this plate has three setae. 

 Peritreme long, the anterior end of it being situated further forward than the 

 greater part of the width of the first coxa. Legs. There is a short spine on 

 the dorsal side of the trochanter and a pair of long spines on the femur of the 

 first leg. Second leg stouter than the others ; its coxa is armed anteriorly with 

 a large claw-shaped spur and it has a sharply pointed conical spur and also a little 

 outer spine on the posterior side ; near the dorsal surface of this coxa there is a 

 fairly large anterior spur which points straight forwards ; tarsus of second leg 

 ending in two sharply pointed spurs, the outer one being very large, but the inner 

 one much smaller. Coxa of third leg with two sharply pointed spurs, the outer 

 one being somewhat curved. Fourth coxa with a single spur, which is much 



