70 



hroad, coarsely spinous at the tip, basal lobe small, carrying 3 densely plumose 

 setse. Posterior maxilla? terminating in 2 narrow setiferous lobes, and having inside 

 a short densely setous masticatory expansion. Maxillipeds with the basal part 

 quite short, epignath linguiform, pointing outwards, masticatory lobe small but 

 distinct, with 2 curved hooks inside, palp large, 5-articulate, the joints coniplan- 

 ated and densely setous. Legs with the joints more or less expanded, and edged 

 with spines and bristles, dactylus comparatively short, not hook-shaped; the 3 

 anterior pairs of legs much shorter than the posterior, and turned forwards. First 

 pair of pleopoda not much differing from the others. Uropoda with the basal 

 [tart produced inside, outer plate narrower than the inner. 



Remarks. This genus was established by Leach as early as in the year 

 1818, and may accordingly be regarded as the type of the family. Its nearest 

 ally is undoubtedly the genus Conilera, which, in almost all anatomical details, 

 agrees very closely, except in the structure of the first pair of pleopoda. The 

 genus comprises rather a large number of species from different parts of the 

 Oceans, amounting to nearly 30 in all. To the fauna of Norway belong 2 

 species only. 



1. Cirolana borealis, Lilljeb. 



(PI. XXIX.) 



Cirolana borealis, Lilljeborg, Ofvers. Vet. Akad. Forh. 1851, p. 23. 

 Syn: Cirolana splnipes, Bate & Westw. (not M.-Edw.). 



Specific Characters. Body oblong oval, broadest in the middle, and grad- 

 ually tapering both in front and behind. Coxal plates rather large and perfectly 

 smooth. Metasome considerably narrower than the mesosome, with the terminal 

 segment scarcely longer than the preceding ones combined, and subtriangular in 

 form, tip bluntly produced and fringed with rather long ciliated bristles, having 

 also 6 8 small marginal spinules. Eyes of moderate size and oval in form. 

 Inferior antennse more than 4 times as long as the superior, with the nagellum 

 very slender and composed of about 30 articulations. Legs with the outer joints 

 densely spinous, ischial and meral joints considerably expanded, and conically 

 produced outside. Last pair of legs with the basal joint very broad, laminar, and 

 densely fringed with delicate setse, meral and carpal joints of moderate size, pro- 

 podal joint much longer than the carpal one. Uropoda with the basal part pro- 

 duced inside to a comparatively short acute process, both plates armed with 

 scattered spinules, the outer one narrow lanceolate, the inner somewhat broader, 

 oblong oval, with the outer edge straight, the inner evenly curved. Body light 



