ANCEUS EDWARUII. 



ISOPODA. 



ABERUANTIA. 



201 

 ANCEID^. 



ANCEUS EDWARDII. 



Specific character. Female with the three posterior segments of the body- 

 forming an elongate-ovate mass. Outer gnathopod minute, four-jointed, 

 inner gnathopod very large, five-jointed, the basal joint not produced into 

 a linear appendage at its inner angle, terminal joints densely ciliated on the 

 outside. 



Length, one-sixth of an inch. 

 Praniza Edivardii. Spench Bath, in Annals Nat. Hist. ser. 3, vol. 21, 

 pi. vi. figs. 1, 2, and details. 



Under this name have been described certain female 

 individuals belonging to this genus, which had cer- 

 tainly arrived at the adult state, as proved, not onl}^ 

 by the existence of fully developed larvse within the 

 incubatory pouch, but also by the structure of the 

 mouth organs, which had entirely lost the suctorial form 

 of the immature condition. These females are of a 

 much narrower and more elongate form than the fully 

 developed females of either of the other species described 

 in this work. It is, in fact, owing to these animals being 

 in the fully developed state that they possess " the more 

 continuous and less graceful outline from the anterior 

 part of the head to the posterior part of the pereion," 

 which the author indicated as distinguishing these 

 animals from the full-grown larvae of Praniza caruleaia. 



