&en. 1. Cuma, M.-Edw., 1828. 



Syn: Bodotria. Goodsir (male). 



Generic Characters. Body of female less slender than in male. Inte- 

 guments strongly incrusted, squamous. Carapace not at all vaulted above, slightly 

 carinated along the middle, sides sculptured with one or 2 carinse, pseudo-rostral 

 projection short, but distinct. 1st pedigerous segment ^conspicuous, being al- 

 most wholly concealed; 2nd segment very large. Eye distinct, much larger in 

 male than in female. Superior antennse with the outer flagellum Inarticulate and 

 carrying 2 sensory filaments, inner flagellum quite rudimentary, knob-like. Infe- 

 rior antennse in female with 3 plumose seta? of the basal joint; those in male 

 equalling the body in length. Posterior lip with the lateral lobes narrowly rounded 

 at the tip and finely ciliated. Palp of anterior maxillse very slender, with 2 un- 

 equal apical setse. 3rd pair of rnaxillipeds with the basal joint expanded at the 

 end outside to a large linguiform lobe. 1st pair of legs not much prolonged; 

 2nd pair with the basal and ischial joints coalesced; the 3 posterior pairs rather 

 small, and but sparingly setiferous. Uropoda with the rami much shorter than 

 the basal part, the inner one uniarticulate or biarticulate. 



Remarks. This genus may be regarded as the type of the family Cumidse 

 and indeed of the whole", order, as from it the name generally used has been 

 derived. It is easily recognised from the other genera comprised in this 

 family, by the greatly incrusted, squamous integuments, the form and sculpture 

 of the carapace, and the almost wholly concealed 1st pedigerous segment. We 

 know as yet of only 4 species, 2 of which belong to the fauna of Norway, and 

 will be described below. 



l. Cuma seorpioides, (Mont.). 

 (PI. i, ii, m.) 



Cancer (Astacus) scorpioides, Montagu, Transactions of the Linnean Society, Vol. IX, p. 70, PI. VI, fig. 5. 



Syn: Cuma Audouini, M.-Edw. 

 Bodotria arenosa, Goodsir (male). 

 Cuma pusilla, G. 0. Sars. 



Specific Characters. Body of female moderately slender, with the anterior 

 division oblong oval in form, and, like the tail, slightly keeled along the 

 back. Carapace about the length of the exposed part of the trunk, and exhibiting 

 on each side, somewhat above the middle, a very conspicuous, horizontal carina 

 extending from the lower side of the pseudo-rostral projection to the hind edge; 



