432 



of uropoda differing more or less from the preceding pairs, and having the 

 rami compressed lanceolate. Telson of moderate size, and generally entire. 

 EemarJcs. This new family is established to include the greater 

 part of the genera referred by Boeck to his subfamily Atylince, the family 

 Atylida being restricted to the forms most nearly allied to the genus Atylus 

 and, besides, including the subfamily Dexaminince of Boeck. In some points the 

 present family shows a near relationship to the Eusirida, and the genus 

 Haliragoides, described below, would seem indeed to form, as it were, a 

 connecting link between the two. Yet I think it may be convenient to 

 keep the 2 families apart, as there are some characteristics, by which most 

 of the forms pretty well distinguish themselves from the Eusiridce, such as the 

 much less powerful structure of the gnathopoda, and the considerably smaller 

 telson, which moreover, with the one exception of the genus Pontogeneia, is 

 entire, not, as in the former, cleft. There is another family to which the 

 present one likewise bears a considerable resemblance, viz., that of the 

 Paramphiihoidce, and indeed some of the species described above under this 

 head, were for this reason referred by Boeck to his genus Amphifhopsis, 

 belonging to the family here treated of. In the restriction here adopted, 

 the family comprises 8 Norwegian genera, 2 of which are now for the 

 first time established. In addition to these, the arctic genus Cle'ippides of 

 Boeck belongs to this family, as also the genus Stenopleura of Stebbing, and 

 perhaps also the genus Harpinioides of the same author. 



Gen. 1. Haliragoides, GK 0. Sars, n. 



Body slender and elongated, without any dorsal projections. Cephalon 

 comparatively large, subtruncated in front, and having the postantennal 

 corners produced to greatly projecting lobes. Coxal plates very small, 1st 

 pair, however, rather expanded in their outer part. Superior antennae 

 considerably shorter than the inferior, and without any accessory appendage. 

 Inferior antennae in both sexes greatly elongated. Anterior lip rounded; 

 posterior lip with distinct, though small inner lobes. Mandibles strong, 

 with the cutting edge coarsely dentated, and the molar expansion large and 

 massive, palp comparatively slender, and having the last joint much shorter 

 than the 2nd. Maxillae of the usual structure. Maxillipeds of moderate size, 

 with the basal and masticatory lobes nearly of equal size, palp rather robust. 

 Gnathopoda subequal and rather feeble, carpus elongated and scarcely 

 expanded below, propodos ovate in form, with the palm very oblique. Per- 



