426 Annals of the South African Museum. 



composition of the pleon, the keel on the telson and the shape of the 

 telsonic apex, the length of the 2nd antennae and the produced 

 peduncular joints of same (out of many examples of P. ungulata I 

 have not seen one in which the 2nd antennae exceed the posterior 

 margin of the 3rd peraeon segment), the inner lobe of the 1st maxilla 

 (P. ungulata has 5 plumose setae), the nonproduced 3rd and 4th 

 joints of the peraeopods and the armature of the 6th joint, the keel 

 on the peduncle and the shape of the ramus of the uropods (in 

 P. ungulata the ramus is nearly square, not evidently broader than 

 long), and lastly the colouration. 



Young specimens taken from the brood pouch show the distinctive 

 produced joints of the peduncle of the 2nd antennae. The telsonic 

 apex has a well-marked semicircular notch, and the postero-lateral 

 angles are rounded. The young of P. ungulata, also from the brood 

 pouch, have the telsonic apex only slightly emarginate. 



As to the genus in which this species should be placed, it will be 

 noticed that it differs from P. ungulata, the type species, in the 

 number of setae on the inner plate of the 1st maxilla and the com- 

 position of the pleon. In the possession of 3 lateral sutures on the 

 pleon it agrees with Glyptidotea, Stebbing, and Pentias, Eichardson ; 

 with the former it also agrees as regards the 1st maxilla (no descrip- 

 tion has been given of the 1st maxilla of Pentias ha;//, Richardson, 

 the only species), but it differs from both as regards the epimera. 



Inasmuch as it agrees with Paridotea in all except these two 

 features, and taking into account the fact that the pleon appears to 

 be subject to considerable variation, even within the same species 

 (see Chilton's discussion in Tr. New Zeal. Inst. vol. 22, 1890, p. 199, 

 on this feature in Idotea (Paridotea) peronii, M. Edw.), there can be 

 little doubt that it should be placed in the genus Paridotea. 



PARIDOTEA KUBRA, n. sp. 

 (Plate XXXVII. A.) 



Body rather flat, smooth, glabrous. Head broader than long, 

 anterior margin arcuate, antero-lateral angles acute, eyes about in 

 middle of lateral margins, dark. Peraeon, 1st segment wider than 

 head, antero-lateral angles rounded, postero-lateral angles of 2nd-7th 

 segments rectangular. Epimera as long as their segments, except 

 those of 2nd and 3rd segments, large, rounded, postero-inferior 

 angles of those of 2nd-5th segments rounded, of 6th rectangular and 

 of 7th subacute. Posterior margins of sterna nearly straight, with 

 rather deep median incision. Pleon with 1 complete and 2 incom- 



