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Occurrence. Only very few specimens of this form have hitherto come 

 under my notice. One of these was found at Haugesund, west coast of Norway, 

 the others at Lillesand, belonging to the south coast of the country, the depth 

 ranging from 20 to 50 fathoms. 



Gen. 50. StenOCOpia, G. O. Sars, n. 



Generic Characters. Body moderately slender and somewhat depressed 

 in its anterior part, with the segments more or less sharply marked off from each 

 other and clothed at the hind edge with small spinules or setee. Rostral projection 

 small. Caudal rami much produced and narrow linear in form. Eye absent. 

 Anterior antennce exceedingly slender and only sparingly setiferous, 8-articulate, 

 with the 1st joint much the largest; those in male hinged in the usual manner. 

 Posterior antennae likewise slender, basal part distinctly subdivided, outer ramus 

 uni- or biarticulate. Buccal area greatly prominent. Oral parts on the whole 

 resembling in structure those in the genus Ameiropsis. Legs very slender and 

 elongated. 1st pair distinctly prehensile, with the inner ramus 3-articulate and 

 longer than the outer, last 2 joints more or less bent upon the 1st. Natatory 

 legs with both rami narrow and elongated, number of setae about as in the genus 

 Ameiropsis; inner ramus of 3rd pair in male not transformed. Last pair of legs 

 with the distal joint long and narrow, inner expansion of proximal joint lamellar, 

 with a varying number of marginal setse. 



Remarks. This new genus in some points exhibits a remote affinity to 

 Ameiropsis, especially as regards the structure of the oral parts. It differs hovv- 

 ever both from this and the other genera comprised within the present family, 

 in the general appearance of the body, the greatly produced caudal rami, and 

 the slender and narrow form of the antennae and of the rami of the natatory 

 legs. It is from this last character that the name of the genus here proposed 

 has been derived. Two very distinct Norwegian species of this genus will be 

 described below, one of them having been previously recorded by Th. Scott as a 

 species of the genus Ameira. Both species are true deep-water forms. 



