cupying .about half the length of the antenna and being composed of 2 joints only, 

 the 1st somewhat dilated and armed anteriorly with 3 successive short tuberculi- 

 form spines and at the end with a strong plumose seta, the second very narrow 

 and terminating in a somewhat claw-like point. 2nd, 3rd and 4th joints of the 

 antenna?, as in the male of Cervinia, provided with large recurved, sausage-shaped 

 sensory appendages. Posterior antennae and oral parts somewhat reduced in size. 

 Natatory legs of exactly the same structure as in the female. Last pair of legs, 

 however, rather different, and of quite an unusual appearance, each forming a 

 slender 4-articulate stem, the 1st joint of which is produced outside to a digiti- 

 form process tipped with a thin bristle, the remaining 3 joints well defined and 

 each armed outside with a slender spine, last joint carrying moreover at the end 

 3 denticulated spines, and the middle joint a single similar spine inside. Genital 

 lobes each with a slender seta outside, followed inside by 2 shorter unequal spines. 



Length of adult male 1.20 mm. 



Remarks. The female of this form has been described and figured in 

 detail in the 1st part of this work, and I here only give on the annexed plate 

 a new habitus-figure of a female specimen for comparison with the hitherto un- 

 known male, of which a description has been given above. The sexual differences 

 are also in this case very conspicuous, as regards both the external appearance and 

 some of the structural details. The structure of the last pair of legs in the male 

 in particular is highly remarkable, and the anterior antennae also exhibit some 

 peculiarities in their structure. 



Occurrence. This form, like the species of the genus Cerrinia, is a 

 true deep-water Copepod, scarcely occurring in depths of less than 40 fathoms. I 

 have found it rather plentifully of late years in the 2 above-mentioned localities 

 in which Cerrinia occurred; but among the numerous specimens collected only 2 

 or 3 males were found. 



Page 27. 



Zosime typiea, Boeck. 



(Suppl. PI. 2, fig. 2). 



Male. Body of much smaller si/e than in female and also rather different 

 in shape, the anterior division being much broader than the posterior, which is 

 narrow cylindrical in form, with none of the segments expanded laterally. Caudal 

 rami comparatively more coarsely built than in female, with the apical setse more 

 prolonged. 3 dark pigmentary patches, arranged in a curved transversal row, 

 constantly present in the ocular region. Anterior antennae much larger than in 

 female, and distinctly hinged, 8-articulate, 3rd joint the largest, 5th joint somewhat 



47 Crustacea. 



