23 



The third maxillipeds (text-fig. 4^'.) have the basis very much broader than in the female 

 and they carry a well developed exopod. 



The basal segment of all except the last pair of legs is greatly expanded on the inner 

 side and produced beyond the articulation of the succeeding segment. In the first pair of legs 

 (text-fig. 4/.) the broad lobe so formed is strongly curved inwards so that in the figure it 

 seems to project from the outer side of the limb. The exopods of the first four pairs of legs 

 are strongly developed, with numerous long and stout natatory setai. 



The first and second pleopods are well developed, the outer ramus of each composed 

 of tvvo segments. 



The peduncle of the uropods (text-fig. 4 /.) is about three times the length of the sixth 

 abdominal somite and bears about 20 spines on its inner edge. The endopod is more, and 

 the exopod distinctly less than half the length of the peduncle. The three segments of the 

 endopod bear on the inner edge respectively 6, 3 and 3 spines. 



Occurrence. Station 93. Plankton. Eight males and one female. 



Station 142. Townet Many males and one or two females. 

 Station 164. One female. 



R e m a r k s. This species is very closely allied to P. brachyiira but appears to be 

 sufficiently distinguished by the long and slender first pair of legs and by other characters. 

 As is indicated above some if not all the specimens in the present collection were taken by 

 the townet and the membranous integument and strongly developed swimming organs of both 

 species seem to indicate that they are adopted for a partially pelagic life. 



Diastylopsis. 



Diastylopsis (?) sp. 



A single very imperfect female specimen from Station 241 probably belongs to an 

 undescribed species but as the carapace is nearly destroyed I do not venture to describe it. In 

 having the third and fourth leg-bearing somites apparently fused and the limbs of these somites 

 carrying minute exopods, it agrees with the Diastylopsis Q) djióia of Bonnier (Ann. Univ. Lyon, 

 XXVI, Campagne du Caudan, p. 559), a species of which the affinities are very uncertain. 



