20 



give figures of the whole animal in dorsal and lateral aspects, and of some 

 of the appendages more highly magnified. 



Occurrence. The male specimen here described was kindly sent to me 

 from Dr. Jules Richard. I have myself not met with this Copepod since I 

 observed the solitary female specimen described in Vol. V and taken at Hval0r, 

 outside the Christiania Fjord. 



Fam. Cerviniidae. 



Gen. Cerviniopsis, G. O. Sars. 



11. Cerviniopsis clavicornis, G. O. Sars. 



(PI. XIII, fig. 1). 

 Cfr. Vol. V, p. 22, PI. XII, PI. XIII, fig. 1. 



Specific Characters. Male. General form of body closely resembling 

 that of female. Rostral plate, however, comparatively larger and more pro- 

 minent, and the 2 anterior caudal segment more sharply marked off from each 

 other. Anterior antennae only slightly transformed, and scarcely at all prehen- 

 sile, being apparently composed of 8 joints, the outer 4 of which, however, 

 are less perfectly defined and together form a thinner terminal part bent back- 

 wards at an angle to the proximal part; 2nd, 3rd, 4th and 6th joints each 

 with a well-developed aesthetask; last joint very small and armed at the tip 

 with a minute claw-like spine accompanied by some unequal setae. Posterior 

 antennae, oral parts, and natatory legs exactly as in the female. Last pair of 

 legs, however, conspicuously transformed, each leg being composed of 3 well- 

 defined joints, the 1st of which, as in female, is quite short and produced 

 outside to a digitiform process carrying a slender seta; middle joint armed at 

 the end outside with a slender spine and about of same size as the terminal 

 one, which carries 5 spines, one outside, 2 inside and 2 on the tip. Genital 

 lobes rather remote, the one from the other, and of very small size, knob-like, 

 each lobe carrying on the tip 2 slender setae. 



Length of the specimen examined 1.13 mm. 



Remarks. Of this form also only the female sex has been described 

 in Vol. V. The male, of which I now am enabled to give a diagnosis, is so 

 very like the female in its outward appearance, that it easily may escape 



