pseudorostral projection considerably shorter, antero-lateral corners blunted. 1st 

 pair of legs with the penultimate and antepenultimate joints of about equal si/r. 

 the hitter with only a few very short scix outside; 2nd pair with the last joint 

 scarcely longer than the antepenultimate one, and carrying about 8 unequal 

 spines. 3rd pair of legs in male with 3 lanceolate appendages of the ischial joint, 

 similar to those in the male of L. piilliiltts, but comparatively smaller. Uro- 

 poda with the inner ramus about the length of the basal part, but shorter than 

 the outer, its distal joint much smaller than the proximal, and linear in form, 

 with from 6 to 8 spines, the apical one rather elongated ; outer ramus with about 

 8 ciliated setae. Colour whitish, with a faint olivaceous tinge. Length of adult 

 female scarcely exceeding 3 mm., of male 3 1 /.' mm- 



Remarks. This is the smallest of the Norwegian species, and is, moreover, 

 easily recognized, in the female sex at least, by the comparatively small, acutely 

 produced pseudorostral projection, and the limited extent of the dorsal crest of 

 the carapace. 



Occurrence. I have found this form rather frequently in the inner part 

 of the Christiania Fjord, in depths varying from 30 to 60 fathoms, and have 

 also occasionally met with it in many other places of the Norwegian coast as far 

 as Yads0. Out of Norway, however, this form has not as yet been recorded. 



Gen. 2. EudOrella, Sp. Bate, 1867. 



Syn: Lcucon, Kroyer (part.). 

 Eudora, Sp. Bate. 



Generic Characters. Body in all the known species slender and elongated, 

 with the anterior division club-shaped and shorter than the posterior. Carapace 

 comparatively small, but rather deep, quite smooth above, and subtruncate in 

 front, without any distinct pseudorostral projection, the antero-lateral lappets as- 

 cending perpendicularly, to meet with their tips in close approximation to the 

 frontal lobe, the usual opening for the expulsion of the water from the branchial 

 cavities being, of course, placed quite dorsally. Anterior edges of carapace 

 more or less distinctly insinuated and dentated below, lower edges serrate in their 

 anterior half. Not the slightest trace of any eye or even of an ocular lobe present. 

 Superior antennse rather strongly built and coarsely setiferous, exhibiting in the 

 middle, or between the 2 outer peduncular joints, a very conspicuous elbow- 

 shaped bend, inner flagelluni well developed, though consisting of only a single 



