352 

 6. Paramphithoe assimilis, G-. 0. Sars. 



(PI. 124, fig. 1). 

 Paramphithoe assimilis, G. O. Sars, Oversigt af Gorges Crustaceer, I, p. 99, PI. 5, fig. 1. 



Body rather slender and compressed, and quite smooth, without the 

 slightest trace of any dorsal projections. Cephalon about the length of the 

 first 2 segments of mesosome combined, rostral projection short and obtuse, 

 lateral corners rectangular, postantennal ones but little produced. Anterior 

 pairs of coxal plates comparatively larger than in the 3 above -described species, 

 and nearly twice as deep as the body; 1st pair, however, much smaller than the 

 succeeding ones, and slightly expanded in their outer part, infero-posteal corners 

 of these and the 2 succeeding pairs having a distinct dentiform projection ; 4th 

 pair narrowly truncated at the tip, posterior projection acute. Last pair of 

 epimeral plates of metasome rather produced at the lateral corners, without, 

 however, forming any distinctly denned dentiform projection. Eyes compara- 

 tively large, and rounded triangular in form. Superior antennae very much 

 elongated and slender, nearly attaining the length of the whole body, 1st joint of 

 the peduncle somewhat longer than the other 2 combined, and produced at the 

 end inferiorly to a dentiform projection, flagellum more than 4 times as long 

 as the peduncle. Inferior antennae, as usual, much shorter than the superior, last 

 joint of the peduncle exceeding in length the penultimate one, flagellum about 

 twice as long as the peduncle. Griiathopoda comparatively feeble in structure, 

 with the carpus well-developed and but slightly expanded below, propodos 

 rather narrow, oblong oval in form, and not nearly attaining the length of 

 the basal joint, palm much shorter than the hind margin, which is armed 

 with several fascicles of spines and bristles. Pereiopoda very slender and 

 elongated, basal joint of the 3 posterior pairs regularly oval in form, with 

 the posterior edge serrulated, and, especially in the last pair, considerably 

 arched. Last pair of uropocla rather elongated, with the inner ramus nearly 

 twice as long as the outer, both edged with strong spines. Telson oblong 

 linguiform, fully twice as long as it is broad, and scarcely tapering distally. 

 tip evenly rounded. Colour in the living state of the animal not yet stated. 

 Length of adult female 8mm. 



Remarks. The present species is easily distinguishable from any of 

 those described in the preceding pages, by the absolute want of dorsal pro- 

 jections, the back being throughout quite smooth and evenly rounded. In 

 the structure of the gnathopoda it somewhat resembles P. pulclidlo. 



Occurrence. Some specimens of this form were collected, many 



years ago, by the author, off the west coast of Norway, in company with 

 P. j>/iJf/n'Jfii, the exact locality not having been stated. 

 Distribution. Greenland (Hansen). 



