432 



of iii'opoda differing more or less from tlie preceding pairs, and having the 

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

 Remarls. — Tliis new famih' is established to include the greater 

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

 Atijlid(E being restricted to the forms most nearly allied to the genus AtyJus 

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

 present family shows a near relationship to the Eusiridce, 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 geniis Pontogeneia, is 

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

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

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

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

 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 Ch'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, G. 0. Sars, n. 



Body slender and elongated, without anj' dorsal projections. Cephalon 

 comparatively large, subtruncated in front, and having the postantennal 

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

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

 considerably shorter than the inferior, and withoiit any accessory appendage. 

 Infei'ior antennae in both sexes greatly elongated Anterior lip roiinded; 

 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- 



