TERHESTHIAL ISOL'ODA OF NATAL. 479 



A single specimen from the former locality and two from 

 the latter. 



PoRCELLiONiDEs lUiev.s = Metaponoethus Biidde-Lund . 



7. Porcellionides pruinosus [Brandt). PI. XXIX, 

 fig-s. 39-47. 



Porcellio pruinosus Brcuult, Bull. Soc. Nat. Moscow. 1833, vi, p. 18] . 



Although there are many slight differences in these speci- 

 mens from the typical P. pruinosus, they are not, in my 

 opinion, sufficient to separate them as a distinct species ; it 

 is possible, however, that further material may show greater 

 differences. The structural features shown on PI. XXIX are 

 of specimens collected by Dr. Akerman at Pietermaritzburg, 

 Feb., 1916. 



Habitat. — Museum Garden, Pietermaritzburg, Sept. 1915 

 (E. Warren). Pietermaritzburg, Pel). 1916 (C. Akerman). 

 Durban, Aug. 1916 (C. Akerman). 



These specimens differ from British examples of this species 

 in the following characters : 



The frontal margin of the cephalon is obtusely pointed in 

 the median line (fig. 39) and not nearly straight as in the typical 

 form. In the antennas the two joints of the flagellum are 

 almost equal in length, the proximal one being oidy a little 

 larger than the distal one (fig. 41). The outer lobe of the 

 1st maxilla (fig. 42) has the six inner spines sharply denticu- 

 lated, or perhaps it would be more correct to describe them as 

 having bifid terminations. The inner lobe distally is truncate. 

 The second maxilla is comparatively wider and more robust 

 and the same remai'k applies to the maxillipede (fig. 44). 

 The appendages of the metasome are also slightly more 

 robust. The telson is somewhat elongated, extending beyond 

 the basal plates of the uropoda, and there are minor differences 

 in the various parts of these latter appendages (Figs. 46- 

 and 47). 



