71 



numerous species of the present genus as yet known. It may be best 

 recognised by the very small size of the caudal rarni, a character which indeed 

 has given rise to the specific name here proposed. 



Occurrence. A solitary female specimen of this form was found last 

 summer (1918) at Hval0r, outside the Christiania Fjord, in a depth of about 

 6 fathoms. 



58. Laophonte tenera, G. O. Sars, n. sp. 



(PI. XLVII). 



Specific Characters. Female. Body rather slender and narrow, rapidly 

 tapered behind, with the segments sharply marked off from each other. 

 Cephalic segment large and tumid, occupying fully half the length of the 

 anterior division; its postero-lateral corners produced in a peculiar manner 

 and curved upwards; rostral projection rather prominent, triangular, and minu- 

 tely bilobular at the tip. Urosome almost as long as the anterior division, and 

 having the lateral expansions of the segments rather prominent and densely 

 spinulose at the edges; last segment scarcely broader than it is long and 

 slightly widening distally, anal opercle finely denticulate at the edge. Caudal 

 rami about twice as long as they are broad and considerably divergent; apical 

 setae of moderate length. Anterior antennae more slender than in the preceding 

 species, though not nearly attaining the length of the cephalic segment, and 

 composed of 7 well defined joints; 2nd joint the largest and oblong oval in 

 form, with a very small prominence of the outer margin. Posterior maxillipeds 

 comparatively larger than in the preceding species. 1st pair of legs likewise 

 more powerfully developed; outer ramus however rather small, not extending 

 to the middle of the proximal joint of the outer, and only composed of 2 

 joints. The 3 succeeding pairs of legs of normal structure. Last pair of legs 

 with the distal joint well developed, broadly spatulate in form, and provided 

 with 5 marginal setae, the innermost but one the longest and issuing from a 

 digitiform process of the joint; inner expansion of proximal joint short and 

 broad, obtusely rounded, and not extending to the middle of the distal joint; 

 marginal setae 4 in number. 



Male of smaller size than female and having the anterior antennae 

 very strongly hinged. 2nd pair of legs with one of the setae attached to the 

 distal joint of the inner ramus transformed in a similar manner to that found 

 in L. brevirostris and allied species. 3rd pair of legs, as usual, much more 

 strongly built than in female, with the inner ramus distinctly 3-articulate and 



