74 
rather slender. Superior antennae of normal appearance. Inferior antennae in 
female extremely small, uniarticulate, with a single apical seta; those in male 
generally shorter than the body. Branchial apparatus with the gill-elements rudi¬ 
mentary. Third pair of maxillipeds pediferm, with the outer corner of the basal 
joint not produced, and carrying a single strong plumous seta. First pair of 
legs of normal structure, and not much produced; 2nd pair with the terminal 
joint in male more or less distinctly hooked at the tip. Anterior pair of pleopoda 
rather large, with the basal part lamellar and carrying strong setse inside, rami 
confluent; posterior pair very small, claviform, without setae. Uropoda moderately 
slender, rami narrow lanceolate, the inner one the longer. 
Remarks .—This genus was established by the present author in the year 
1864, to include a small Cumacean found off the Lofoten Islands, and at that 
time regarded as new, but subsequently identified with a form very imperfectly 
described and figured by P. van Beneden as Lexicon cercaria. In the restriction 
of the genus here adopted, it comprises only 3 other species, viz., the Mediter¬ 
ranean form, P. ciliata G-. 0. Sars, the Caspian form, P. cercaroides G-. 0. Sars, 
and a new Norwegian species, to be described farther on. 
l. Pseudoeuma eerearia (v. Beneden). 
(PI. LI & LII). 
Lexicon cercaria l’. v. Beneden, Recherches sur la Paune littorale de Belgique.’ 
Crustaces, p. 85, PI. IV. 
Syn: Pseudoeuma histriata, G. 0. Sars. 
„ ? Cyrianassa longicornis, Sp. Bate (male). 
„ Ouma bella, Meinert. 
Specific Characters. — Female. Body more slender than in the other species, 
with the anterior division considerably vaulted dorsally and ovate in form. Cara¬ 
pace somewhat exceeding in length the exposed part of the trunk, and sloping 
considerably in front, lateral faces sculptured with 2 distinct oblique plicae 
extending from the hindmost part of the branchial regions to the subrostral 
corners, the latter unarmed; pseudorostral projection rather prominent, termi¬ 
nating in an acute point. Tail very slender, slightly exceeding in length the 
anterior division. First pair of legs scarcely longer than the carapace, basal 
joint occupying about half the length of the leg, the 3 distal joints rapidly dimi¬ 
nishing both in length and width, terminal joint very narrow, linear; 2nd pair 
with the terminal joint conically tapered and about the length of the antepenulti¬ 
mate one; 3rd and 4th pairs not very slender, rudimentary exopodite distinctly 
