400 



A'l.l also tin- following new genus: 



Pseudameira, <i. <>. Sars, n. 



' '//'// '"-' />. 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 



Ir-^ produced. with the apical seta> rather strong and conspicuously spinulose. 



Anterior antenna' short and thick, with the number of joints reduced, and with 



<>f the seta' very strong and spinulose at the edges. Posterior antennae 



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



milling in structure those in the genus I'unnui'ira. 1st pair of legs imper- 



;\ 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 .'{-articulate and the number of seta? more or less reduced. 



!. pair of le^s resembling in structure those in the genus Ani<n'<i. 



l,'i //"//7,-x. This new genus is nearly related to Pin-niinirn. differing, 

 houe\er. conspicuously in the structure of the anterior antenme and that of 

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



Pseudameira crassicornis, G. 0. Sars (new name). 



(Suppl. PI. 29). 



ira ///,.,,/. var,, Th. S.-ott, in 20th Ann. \{t>\>. of tin.- KMn-rv Koanl I'm- Sfothiml, I'arl HI 



I'l. XXIII, li-rs. 34 42 (without description). 



Specific Cliiii-itrti-,-*. I'rniiil,'. Body comparatively short and stout, with 

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

 1 j.halir s,. grille ut o!' moderate si/.e and narrowly rounded in front; rostral pro- 

 H.II almost obsolete. I'rosome about the length of the anterior division, and 

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

 gmenl of modei'.-ite size and imperfectly subdivided, last segment about 

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

 1 ; 'dal rami s.-iircrly exceeding i,, length the anal segment, and of somewhat 

 conical shape, apical setffi of moderate length. Anterior antenme about half the 

 b'i' phalic segment, and composed of only li distinctly delined joints. 



\hich belong to the terminal |>art. the 1st of them very small, the 2nd large 

 '"id tumid, oblong oval in form, and carrying several strong spinulose seta' in 

 addition to the usual ones, Posterior antenna' with the distal joint about the 

 t the proximal one. outer ramus somewhat curved and carrying one 



