224 



rami short. Anterior antennse 8-articulate, with the first 2 articulations muc 

 the largest. Posterior antennse with the basal part distinctly subdivided, outer 

 ramus biarticulate, last joint small, but well defined. Mandibular palp distinctly 

 biramous, with both rami uniarticulate and of equal size. Maxilla? with the exo- 

 podal and epipodal lobes well defined. Anterior maxillipeds with 2 digitiform 

 lobes inside the claw-bearing joint. 1st pair of legs rather strongly built and 

 distinctly prehensile, inner ramus, as usual, longer than the outer and 3-articulate, 

 with the last 2 joints comparatively short and bent upon the 1st. Natatory legs 

 well developed, resembling in structure those in the genus Parameira, inner ramus 

 of 3rd pair of legs not transformed in male. Last pair of legs with the distal 

 joint more or less produced, tapering towards the end; inner expansion of proxi- 

 mal joint of moderate size, triangular in form. 



Remarks. This new genus also bears a close relation to Ameira, as indi- 

 cated by the name here proposed. It is however prominently distinguished by 

 the much fuller development of the oral parts, and more particularly by the 

 distinctly biramous mandibular palp. In the structure of the posterior antennse 

 and legs also some well-marked differences are found to exist. The form recorded 

 by Brady in his Monograph as Ameira longipes Boeck, according to the structure 

 of the mandibles, undoubtedly belongs to the present genus, and this is also the 

 case with some of the new species of Ameira described by Th. Scott. In the 

 following pages 3 Norwegian species will be described. 



, 



144. Ameiropsis brevicornis, G. 0. Sars, n. sp. 



(PI. CXLVIII). 

 ? Syn: Ameira longipes, Brady (not Boeck). 



Specific Characters. Female. Body comparatively robust, with the anterior 

 division somewhat tumefied in front. Cephalic segment of moderate size and 

 evenly rounded in front, rostral projection very small. Urosome much shorter 

 than the anterior division, last segment about the size of the preceding one, anal 

 opercle very small. Caudal rami scarcely as long as they are broad, and some- 

 what obliquely truncated at the tip, apical setae of moderate length. Eye imper- 

 fectly developed. Anterior antennse rather short and stout, scarcely exceeding 

 half the length of the cephalic segment, proximal part about twice the length of 

 the terminal one. Outer ramus of posterior antennse with the proximal joint 

 smooth inside ad gradually widening somewhat towards the end, last joint trans- 

 versely truncated at the end, with the 2 apical seise somewhat unequal in length. 



