ORAL APPENDAGES OF MARINE ISOPODA. 83 



12. Paridotea reticulata, Barnard. (PL 8. figs. 26, 27.) 

 Paridotea reticulata, Barnard, Ann. Sth. Afr. Mus. vol. x. (1914) p. 424, pi. 36 D. 



Barnard, in describing this beautiful species, states : "The mouth-parts 

 resemble those of P. ungulata, except that the lateral margins of the epistome 

 are angular, not evenly convex, and the inner lobe of the first maxilla has 

 only three plumose seta?.'" 



The First Maxilla (PI. 8. fig. 26). — The outer lobe terminates in twelve 

 spines, three or four of the innermost being denticulate. The inner lobe is 

 narrower than in P. ungulata and has only three terminal setose spines and 

 a single setule on the anterior outer margin. 



The Maxillipede (PI. 8. fig. 27). — Whilst bearing a strong resemblance to 

 the maxillipede of P. ungulata, this appendage in P. reticulata is rather more 

 robust and setose. The basipodite is wider on its posterior margin and 

 more obliquely cut away anteriorly. The second joint of the palp is smaller 

 than in P. ungulata and the third longer and wider. The epipodite is about 

 the same width as the basipodite, but narrows considerably towards its apical 

 end. The whole appendage is densely setose, and there are a series of strong 

 spines on the outer expanded margin of the third joint of the palp. 



13. Paridotea rubra, Barnard. (PI. 8. figs. 28, 29.) 



Paridotea rubra, Barnard, Ann. Sth. Afr. Mus. vol. x. (1914) p. 426, pi. 37 A. 



The mouth-parts of this species have not hitherto been figured. Barnard's 

 description is brief — he states : " First maxilla, outer plate with ten spines, 

 the two innermost denticulate, inner plate with three plumose setse. . . . 

 Maxillipede seven-jointed, epipod reaching to the end of the fourth joint, 

 apex incurved." 



Ihe First Maxilla (PL 8. fig. 28). — The outer lobe terminates in ten spines, 

 the outermost one is smaller than the second one, and the two innermost are 

 faintly denticulate ; the inner lobe is narrow and has three setose spines and 

 a prominent setule. 



The Maxillipede (PL 8. fig. 29). — The two divisions of the coxopodite are 

 small. The basipodite is narrow and elongated, with both inner and outer 

 margins almost straight, the posterior margin is obliquely cut away towards 

 the epipodite, anteriorly the segment flanks the first joint of the palp on both 

 sides. The five-jointed palp is typical of the genus. The inner distal lobe 

 is rather longer than in the preceding species. The epipodite is slightly 

 narrower than the basipodite, excepting at its base ; it is curved inwards 

 anteriorly and extends as far as the middle of the third joint of the palp, not 

 to the end of the fourth joint as stated by Barnard. 



