559 



2 acute projections, dactylus rather strong; those in male much more strongly 

 built, with all the joints considerably thickened, propodos but little longer 

 than the carpus, and having the palm somewhat concave, and denned below 

 by a well-marked angular projection, in addition to the 2 median ones, 

 dactylus very strong and curved. The 3 posterior pairs of pereiopoda with 

 the basal joint rather large and laminar, that of the antepenultimate pair 

 somewhat broader than in the 2 succeeding pairs. Last pair of uropoda 

 with the rami scarcely longer than the basal part, and somewhat tapering 

 distalty, each bordered by a number of short spines. Telson about as broad 

 as it is long, and slightly tapering distally, with a strong spine accompanied 

 by a few hairs on either side of the angular tip. Colour, according to 

 Sp. Bate, pale yellow, with a reddish blotch (the transclucent intestine?) 

 anteriorly. Length of adult female 8 mm, of male about the same. 



EemarJcs. This form was first described by Prof. Lilljeborg under 

 the above name, and was subsequently referred by Bruzelius to his genus 

 Autonoe. Sp. Bate at first recorded it as Eurystheus tridentatus, but subsequently, 

 recognizing its identity with Lilljeborg's species, named it Eurystheus 

 erytliropWmlnms. It would seem that none of these authors have been aware, 

 that Prof. Lilljeborg had already proposed a generic name for that division 

 of the genus Gammarus, in which this species was comprised. As stated by 

 the author in another place, the Gammaropsis eryihrophihalma of Boeck is 

 not identical with this, but with the succeeding species. From the latter it 

 is easily distinguished, not only by the bright red pigment of the eyes, but 

 also by several other well-marked characteristics. 



Occurrence. I have met with this form occasionally in several 

 places on the south and west coasts of Norway, in depths varying from 

 20 to 50 fathoms. In the Trondhjemsfjord I have not yet found it, nor yet 

 in any place lying farther north. 



Distribution. British Isles (Sp. Bate), Bohuslan (Bruzelius), 



Kattegat (Meinert), Dutch coast (Hoek), coast of France (Chevreux), 

 Azores (Barrois). 



