400 

 Add also the following new genus: 



Gen. Pseudameira, o. o. Sars, n. 





Generic Characters. Body comparatively robust, resembling somewhat 

 that in Parameira, though having the posterior division conspicuously narrower 

 than the anterior. Rostral prominence extremely small. Caudal rami more or 

 less produced, with the apical setae rather strong and conspicuously spinulose. 

 Anterior antennae short and thick, with the number of joints reduced, and with 

 some of the setae very strong and spinulose at the edges. Posterior antennae 

 with the basal joint not subdivided, outer ramus small, uniarticulate. Oral parts 

 resembling in structure those in the genus Parameira. 1st pair of legs imper- 

 fectly prehensile, inner ramus only slightly longer than the outer and 3-articulate, 

 with the 1st joint comparatively short. The 3 succeeding pairs of legs rather 

 large, with both rami 3-articulate and the number of setae more or less reduced. 

 Last pair of legs resembling in structure those in the genus Ameira. 



Remarks. This new genus is nearly related to Parameira, differing, 

 however, conspicuously in the structure of the anterior antennae and that of 

 the natatory legs. Two species referable to this genus will be described below. 



Pseudameira erassieornis, G-. 0. Sars (new name). 



(Suppl. PI. 29). 



Ameira reflexa, var., Th. Scott, in 20th Ann. Hep. of the Fishery Board for Scotland, Part III 

 PI. XXIII, figs. 3442 (without description). 



Specific Characters. female. Body comparatively short and stout, with 

 the anterior division oval in outline and conspicuously broader than the posterior. 

 Cephalic segment of moderate size and narrowly rounded in front; rostral pro- 

 jection almost obsolete. Urosome about the length of the anterior division, and 

 having the hind edges of the segments coarsely spinulose ventrally and laterally; 

 genital segment of moderate size and imperfectly subdivided, last segment about 

 the length of the preceding one, and having the anal opercle comparatively small. 

 Caudal rami scarcely exceeding in length the anal segment, and of somewhat 

 conical shape, apical setae of moderate length. Anterior antennae about half the 

 length of the cephalic segment, and composed of only 6 distinctly defined joints, 

 2 of which belong to the terminal part, the 1st of them very small, the 2nd large 

 and tumid, oblong oval in form, and carrying several strong spinulose setae in 

 addition to the usual ones. Posterior antennae with the distal joint about the 

 length of the proximal one ? outer ramus somewhat curved and carrying one 



