HYDRACARINA 



95 



9 . The female does not differ essentially from the male. It is larger and the genital 

 area has not quite the same appearance, owing to the genital lips, which are convexly 

 swollen and much more projecting and conspicuous than in the male. They are covered by 

 papillae, the size of which equals that of the other papillae of the skin. This sexual diifer- 

 ence is similar to that in Protaia (Lundblad, 1927, p. 212), though the male in Protziella 



Figure 4.— Protziella hutchinsoni gen. et sp. n. A, first leg ( 5 ) ; B, fourth leg C 5 ) ; C, genital organ {$) 



D, genital organ ( 9 ). 



has no bristles on the genital lips. The genital plates resemble those of the other sex, as do 

 also the acetabula, the number and shape of which also agree. As in the male there is only 

 an anterior supporting body : another chitinous spot lies at some distance behind the genital 

 field, free in the skin. Posterior to the genit:d plates there is a very small supplementary 

 genital plate on each side, carrying some few bristles. The genital opening measures 318/* 

 in length.* 



' In the figure the male genital organ is more magnified than tliat of the female and thus seems to be larger, 

 but in reality it is rather smaller. 



