285 



dark brownish. Antennae somewhat unequal in length, especially in the male, 

 the superior ones being much the larger, though scarcely exceeding in length 

 YS of the body, 1st joint of the peduncle about the length of the 2nd, and 

 without any projecting lobe at the tip, fiagellum half as long as the peduncle 

 and composed of 9 articulations only. Inferior antennae very slender, and (in 

 male) scarcely longer than the peduncle of the superior ones, last peduncular 

 joint but little shorter than the penultimate one, flagellum about the length 

 of the former. Anterior gnathopoda comparatively less slender than in the 

 type species, basal jont somewhat dilated, and densely setous on both edges, 

 proximal part of the carpus considerably dilated and oval in form, carpal 

 process less slender than in L. spinicarpa. and finely serrated on the upper 

 edge, tip slightly upturned, propodos very narrow, and having the inferior 

 edge smooth, dactylus extremely small, nail-like. Posterior gnathopoda with 

 the carpal process rather narrow, and provided inferiorly with tufts of fine 

 bristles, tip scarcely expanded and tridentate, propodos subfusiform in outline, 

 outer part considerably tapering, palm very oblique, and defined below by a 

 slight angle, its edge quite smooth and nearly straight, dactylus less strong 

 than in the type species, and abruptly bent at the base. Pereiopoda extre- 

 mely slender, with the propodal joint, especially of the 2 anterior pairs, very 

 much elongated, dactylus rather slender, basal joint of last pair regularly oval, 

 posterior edge finely serrulate and evenly curved. Last pair of uropoda with 

 the rami nearly as long as the basal part. Telson rather short, triangular 

 oval, but little longer than it is broad at the base, tip obtusely pointed. 

 Body pellucid with a faint yellowish tinge, and ornamented with irregular 

 orange and pinkish specks, partly forming across the back interrupted trans- 

 versal bands. Length of adult female scarcely attaining 6 mm. 



Remarks. This form was first found by Prof. Lilljeborg at Kul la- 

 berg, Bohuslan, but described by him as L. articulosa Mont. In 1860, at the 

 8th meeting of the Scandinavian naturalists, Boeck called attention to some 

 striking differences in the form described by Prof. Lilljeborg, from the type 

 species as regards the structure of the anterior gnathopoda, and the shape of 

 the 4th pair of coxal plates, and proposed to establish the latter as a distinct 

 species under the name af L. Lilljebor</ii. The Rev. Mr. Norman found 

 the same form at the Shetland Isles, but referred it to L. fnr'nia Savigny, 

 and I recorded it myself under this name in my 0versigt. In 1889, h<>\v 

 ever, Mr. Norman recognized the specific difference of this form from L. fiirii/<t, 

 and described it as a new species under the name of L. imparicornis, giving 

 at the same time some detail figures, which have enabled me to identify it 

 with the form here treated of. In the plate the name proposed by Norman 

 has been inserted, but I now consider it more advisable to retain for the spe- 



