

159 



scarcely exceeding in length the anal segment, and slightly divergent; seta of 

 outer edge attached about in the middle; apical setae normally developed and 

 finely ciliated, the inner mediate one about the length of the tail without the 

 caudal rami; seta of inner corner considerably longer than that of the outer. 

 Anterior antennae moderately slender, about equalling in length the cephalon, 

 and of the usual structure. Posterior antennae with the 2nd joint scarcely as 

 long as the outer 2 combined; penultimate joint with the distal bristle trans- 

 formed into a claw-like spine; apical claws not particularly strong and 4 in number, 

 increasing successively in length inwards, the innermost one rather slender, 

 almost setiform. Maxillae with the terminal lappet rather slender and edged 

 inside with a finely striated lamella, at the base of which a small denticle is 

 attached; palp comparatively larger than in most other species and projecting 

 at the end, inside the apical setae, to an angular corner, in front of which a 

 very small additional seta is attached. Anterior maxillipeds with the proximal 

 spinules of the apical lash much coarser than the others. Natatory legs with 

 the spines attached outside the outer ramus rather small, 3 such spines occur- 

 ring on the terminal joint, except in the 4th pair; inner ramus of this pair 

 scarcely as long as the first 2 joints of the outer combined, and haviug the 

 dista! joint considerably narrowed in its outer part; apical spines very unequal 

 in length. Last pair of legs with the free joint short cylindric in form; inner 

 apical seta spiniform and much shorter than the outer. Ovisacs large, narrow 

 oblong, or almost cylindric in form, and extending far beyond the end of 

 the tail. 



Body pellucid, with a slight yellow or orange tinge. 



Length of adult female 0.90 mm. 



Male unknown. 



Remarks. I cannot doubt that the above-described form is identical 

 with the species recorded by Canu as L. Poucheli, though some small diffe- 

 rences may be found, on comparing the figures here given with those 

 reproduced by Canu. It differs from all the 5 preceding species in the per- 

 fectly normal development of the caudal setae, indicating its freer existence as a 

 true ectoparasite. 



Occurrence. Only 2 female specimens of this form have as yet come 

 under my notice. The one of them was taken many years ago off the west 

 coast of Norway, at Skjerjehavn, the other at Risor on the south coast. Both 

 specimens w%re found in the free condition among dredged material procured 

 from moderate depths. Canu found this form as a semi-parasite on the sur- 



