84 
reduced to a single very small joint attached near the inner corner of the meral 
joint; branchial apparatus well developed, gill-elements arranged in a semicircle, 
digitiform in female, leaf-like in male. Second pair of maxillipeds of rather 
anomalous appearance, basal joint very massive and confluent with the ischial 
one, carpal and propodal joints connected at nearly a right angle, the former 
triangularly expanded inside, the latter oblong oval in form, and terminating in 
a setiform lappet, terminal joint very small and armed with strong diverging 
spines. Third pair of maxillipeds of more normal structure, with the meral joint 
more or less dilated. First pair of legs unusually small, and resembling in structure 
the 3rd pair of maxillipeds; 2nd pair much bent, with the terminal joint styli- 
form. The 3 posterior pairs of legs in female successively diminishing in length 
and rather narrow, basal joint of 3rd and 4th pairs in male greatly dilated. 
Uropoda with the rami shorter than the stem, the inner one the larger and 
spinulous inside, stem in male clothed with slender setae inside. 
Remarks. —This genus was established by the present author in the year 
1864, to include the anomalous form described by Prof. Lilljeborg as Cuma 
rubicunda, and at the same time 2 new Norwegian species were added. Subse¬ 
quently the number of species has been considerably augmented, amounting at 
present to no less than 14. One of these species, however, the Greenland form, 
C. earinata of Hansen, is, I think, scarcely referable to the present genus, and 
may indeed even belong to a different family, the Nannastacidce. As, however, 
neither the legs nor the oral parts of this form have been examined, it is impos¬ 
sible at present to settle this question. To the fauna of Norway belong 8 different 
species, to be described below. 
l. Campylaspis rubicunda (Lilljeborg). 
(P). LVI, LVII). 
Cuma rubicunda , Lilljeborg. 0fvers. af Vet. Akad. Fbrhandl. 1855, p. 121. 
Specific Characters. — Female. Body very short and robust, with the an¬ 
terior division greatly tumefied. Carapace of quite an extraordinary size, occupying 
half the length of the body, and boldly arched behind, surface perfectly smooth 
throughout, frontal part but slightly exserted, pseudorostral projection short, 
though acute at the tip, subrosti’al corners obsolete. The first 2 pedigerous seg¬ 
ments elevated dorsally to well-marked procurved lamellae. Caudal segments 
distinctly depressed and comparatively short. Eye distinct, semicircular and 
somewhat prominent. Anterior maxillae with the palp very slender and carrying 
a single apical seta; posterior maxillae with only 3 apical bristles and one lateral. 
