115 



Male rather unlike the female in its outward appearance, the body 

 being very thin, blad-like, and broadly oval in outline, with the epimeral 

 plates of all the segments, except the last trunkal and the last caudal one, 

 lamellarly expanded and closely contiguous. Last trunkal segment very small 

 and almost wholly concealed by the neighbooring segments. Last caudal 

 segment likewise much smaller than in female. Conspicilla less sharply marked, 

 and somewhat remote from the frontal margin. Posterior maxillipeds, as usual, 

 more fully developed than in female, with the apical claw long and slender, 



Body of female (according to Giesbrecht) of a somewhat opaque 

 yellowish grey colour, with pale reddish ovaria and ovisacs; that of male 

 highly pellucid and, in the living state, brillantly iridescent. 



Length of female attaining 7.40 mm.; that of male 7.10 mm. 



Remarks. This is much the largest of the known species, and in the 

 adult state it may thereby be easily recognised. In the general form of the 

 body, however, as also in the structure of the several appendages it agrees 

 very nearly with some of the other species, for instance S. gemma Dana, with 

 which it was indeed identified by Brady. The S. salpce of Glaus is quite cer- 

 tainly the present species. 



Occurrence. The present form, it is true, has not yet been recorded 

 from the Norwegian coast, nor have I myself ever met with it here. I think, 

 however, that it notwithstanding ought to be included in the Norwegian fauna 

 as an occasional visitor. For it not seldom happens that shoals of Salpcp 

 (S, runcinata, Chamissoj by heavy gales and currents are thrown from the 

 open sea to certain points of our western coast, and, as the present copepod 

 is a constant companion of Salpae, it is very likely to believe that it also in 

 such cases has been associated with these pelagic Tunicata 1 ). The figures 

 here given are drawn from specimens taken during the Monaco Expeditions 

 in the North Atlantic Ocean. 



Distribution. - North and South Atlantic, Mediterranean, Indian 

 Ocean, Pacific. 



'), My late father once witnessed such an influx of Salpae at Floro, where he at 

 that time was settled as a pastor, and on a drawing made by him of a Salpa a parasit was 

 indeed sketched within the pallial cavity, the relatively large size of this parasite supporting 

 the suggestion that in fact it might have been a female of the present species of Sapphirina. 



