New Genus of Terrestrial Isopoda. 19 



flattened and expanded transversely, so as to form a surface 

 against which rests the face of the propodite when the latter is 

 bent back. The shape of the carpus is represented in the 

 drawing. The propodite is much more swollen than in any of 

 the three species hitherto described and is broadly triangular. 

 The proximal half of the palm surface is produced so as to form 

 a more or less flattened plate which terminates distally in a 

 single stout tooth. Proximally to this the plate is bordered by a 

 row of six short, stout spines, which lie slightly to the outer side, 

 so that, when closed, the dactylos lies inside them. The dactylos 

 is a long, powerful, curved structure, which can be closed down 

 upon the palm of the propodite. At about half its length it 

 bears a strongly-developed tooth, which tits into the space 

 between the tooth on the propodite and the base of the dactylos. 



Setaj are not so numerous as on the corresponding appendage 

 of P. anstralis. The basos bears a few which are very short ; 

 the ischios carries a few tufts on its posterior side ; the meros 

 has very few ; the carpus has well-developed tufts on its posterior 

 side ; a fringe of seta? lies to the outside of the spines on the 

 posterior edge of the propodite, which also carries a narrow 

 transverse band of setae at the base of the dactylos on the 

 anterior and posterior sides. The dactylos carries minute groups 

 of little setae, the groups being arranged in longitudinal rows. 



Other Appendages of the Pereion. — The second, third and fourth 

 appendages agree generally in form with those of P. australis, 

 but the setse are short, strong and spiney and very much less 

 numerous. In the male there are no spines on the propodite 

 similar to those of P. australis, and the dactytopodite is not bent 

 round so as to form a claw, and has only a slight tooth developed. 

 The fifth, sixth and seventh are similar to the fourth, the basos 

 not being expanded as in P. australis. 



First Pleopod (Fig. 8). — The endopodite is much stouter than 

 the exopodite. At the inner proximal end a small lobe is 

 indicated, and is indistinctly separated off from the main 

 part, which terminates distally in a rounded end which is not 

 emarginate as in P. australis. 



The exopodite is long, narrow and pointed, with a slight 

 curvature outwards and a lobe at its proximal end running 

 alongside the basal portion. The margin of the exopodite is 

 fringed with long simple setae. 2a 



