233 



Occurrence. Only 3 specimens of this interesting form have hitherto come 

 under my notice. One of these specimens was taken at Flekkero, the other 2 at 

 Farsund, both localities belonging to the south coast of Norway. 



Distribution. Scottish coast (Scott). 



150. Phyllopodopsyllus furciger, G. 0. Sars, n. sp. 



(PL CLVI). 



S2)ecific Characters. Female. General form of body very similar to that 

 in the preceding species. Cephalic segment, however, still somewhat larger, ex- 

 ceeding in length the 4 succeeding segments combined. Urosome with the 2nd 

 segment produced ventrally at the hind edge, as in the type species; last segment 

 rather small, with the anal opercle more prominent and finely ciliated at the 

 edge. Caudal rami much larger than in P. Bradyi, being twice as long as the 

 anal segment, and having the inner edge evenly convex, dorsal face distinctly 

 keeled; apical seta forming at the base a very strong dilatation projecting inside 

 to a rounded lobule. Anterior antennae scarcely as long as the cephalic segment, 

 and only composed of 8 articulations, the penultimate and antepenultimate ones 

 being fused together, 1st joint considerably exceeding in length l / s of the whole 

 antenna, 2nd joint produced behind to a very strong claw-like process, broader 

 and more curved than in the type species. Posterior antennae and oral parts of 

 a similar structure to that in P. Bradyi. 1st pair of legs comparatively smaller 

 with the joints of the outer ramus of nearly equal size, distal joint of inner ramus 

 exceeding l / s of the length of the proximal one, apical claw and seta extremely 

 slender. Natatory legs almost exactly as in the type species. Last pair of legs 

 also very similar, each plate however exhibiting in front of the middle a faint 

 suture crossing the plate, and indicating the line of union between the two original 

 joints, inner edge of the plate carrying, immediately in front of the suture, a 

 series of 3 slender hair-like setae. 



Colour not yet ascertained. 



Length of adult female 0.73 mm. 



Remarks. The above-described form is closely allied to P. Bradyi, though 

 evidently specifically distinct, being at once distinguished by the much greater 

 size and different form of the caudal rami. On a closer comparison moreover 

 some other minor differences are found to exist. 



Occurrence. The solitary specimen of this form observed was found in a 

 sample taken at Farsund, south coast of Norway, from a depth of about 30 fathoms, 

 muddy sand. 



