223 



143. Parameira major, G. 0. Sars, n. sp. 



(PI. CXLVII). 



Specific Characters. Female. Very like the preceding species in its 

 general appearance, but of larger size and somewhat more slender form of body. 

 Cephalic segment scarcely longer than the 2 succeeding ones combined, and evenly 

 rounded in front. Last caudal segment fully as large as the preceding one, anal 

 opercle far less prominent than in P. parva. Caudal rami, on the other hand, 

 more produced, being almost twice as long as they are broad, and transversely 

 truncated at the tip. Anterior antennae resembling in structure and seize those 

 in the preceding species; none of the setse however ciliated. Posterior antennae 

 with the outer ramus distinctly biarticulate and carrying 3 setse, 2 apical and 

 one lateral. 1st pair of legs comparatively larger than in P. parva, inner ramus 

 considerably longer than the inner, with the 1st joint oblong in form. Natatory 

 legs with the inner ramus much shorter than the outer, joints of both rami rather 

 expanded. Last pair of legs rather unlike those in the preceding species, distal 

 joint narrow oblong in form, scarcely at all attenuated towards the end, which is 

 obliquely truncated, one of the apical setse very slender and elongated; inner 

 expansion of proximal joint short and broad, all 4 setae issuing from the bluntly 

 truncated end. 



Colour whitish. 



Length of adult female 0.82 mm. 



Remarks. This form, though nearly related to P. parva, is evidently 

 specifically distinct, differing, as it does, both by its larger size and in the struc- 

 ture of some of the appendages, as pointed out in the above diagnosis. It also 

 differs from the 2 species described by Th. Scott as Ameira reflexa and A. lon- 

 giremis. 



Occurrence. Only some few specimens of this form have as yet come 

 under my notice. They were found at Farsund, south coast of Norway, in a 

 depth of about 30 fathoms, muddy sand. 



Gen. 49. AmeirOpSiS, G. 0. Sars, n. 



Generic Characters. Body resembling in form that in the genus Ameira, 

 though being somewhat more robust, with the urosome broader and somewhat 

 depressed in its anterior part. Rostral projection small, but distinct. Caudal 



