269 



densely hispid lamelliform caudal rami. From the nearly allied species, .1. hiter- 

 niciliK (Scott), it may be distinguished by the somewhat different form of these 

 rami, as also by some differences in the structure of the 1st pair of legs, as 

 shown by the figures given by that author. 



Occurrence. I have found this form occasionally off the south coast of 

 Norway, at Ris0r and Lillesand, in moderate depths, but more frequently off the 

 south-west coast, at Skutesnses and Haugesund. In the last-named locality it also 

 occurred in tidal pools together with other littoral forms. 



Distribution. British Isles (Brady). 



Gen. 55. LaOphOHtOdeS, Scott, 1894. 



Generic Characters. Body more or less slender, with all the segments 

 sharply marked off from each other by conspicuous constrictions. Cephalic seg- 

 ment comparatively broad and projecting in front to a triangular rostral plate 

 not defined at the base. Urosome with the postero-lateral corners of the seg- 

 ments more or less produced. Caudal rami long and narrow, with one of the 

 apical setse rather strong. Anterior antennae in female comparatively slender, 

 with the 2 outer joints of the proximal part confluent; those in male hinged in 

 the usual manner. Posterior antennae with no trace of an outer ramus. Man- 

 dibular palp comparatively small, club-shaped. Maxillse with the exopodal and 

 epipodal lobes imperfectly developed. Anterior maxillipeds comparatively small, 

 with only 2 digitiform lobes inside the claw-bearing joint. Posterior maxillipeds 

 of normal structure. 1st pair of legs with the outer ramus much smaller than 

 the inner, though composed of 3 well-defined joints, the last of which is rather 

 short and obliquely truncated at the tip, spine of 1st joint of normal appearance, 

 all the other 5 spines slender, geniculate, and gradually increasing in length dis- 

 tally; inner ramus, as in Laophonie. distinctly prehensile, biarticulate, with the prox- 

 imal joint long and slender, distal joint armed at the tip with a curved claw and 

 a slender seta. Natatory' legs more or less extended laterally, the 2nd basal joint 

 being considerably produced and bent upon the 1st in an elbow-like manner, rami 

 very unequal and attached at rather a long distance from each other, the outer one 

 slender, 3-articulate, with the spines rather elongated, inner ramus much smaller 

 than the outer, narrow linear in form, and composed of only 2 joints, the 1st very 

 small and in some cases imperfectly defined; inner ramus of 3rd pair of legs in male 



