569 



part somewhat produced, lateral corners more or less projecting between the 

 2 pairs of antennae, postantennal corners well marked. Anterior pairs of 

 coxal plates comparatively large and closely contiguous; 5th pair scarcely 

 smaller than the preceding pairs, their anterior lobe being very strongly 

 developed. Eyes small, placed near the extremities of the lateral corners of 

 the cephalon. Antennae subequal, and generally densely setiferous posteriorly, 

 with the peduncles elongated, the superior ones without any accessory 

 appendage. Mandibular palps rather elongated, with the terminal joint 

 comparatively short and densely setous. Oral parts otherwise normal. 

 Gnathopoda distinctly subscheliform, the posterior ones being somewhat 

 larger than the anterior; both pairs in male, but especially the posterior 

 ones, considerably more strongly built than in female. Pereiopoda not much 

 elongated, antepenultimate pair rather stout and strongly reflexed, with the 

 basal joint boldly curved anteriorly, and the dactylus inverted. Last pair of 

 uropoda comparatively slender, extending beyond the others, basal part 

 rather large and somewhat expanded at the base below, rami very unequal, 

 the inner one being very minute, the outer one elongated and having a small 

 terminal joint. Telson extremely small, triangular in form. 



Remarks. - This genus was established by Kreyer as early as in the 

 year 1842, to include an Arctic species P. Eeinhardi. The genus Eisclcuh^ 

 of Sp. Bate is undoubtedly identical with that of Kroyer. It is a very 

 distinct genus, exhibiting some features in common with the genus Am- 

 phitlioe belonging to the next family. The smooth, generally boldly-curved 

 body, the deep, closely contiguous coxal plates, the long and narrow urosome, 

 and the unusually stout and strongly recurved antepenultimate pair of 

 pereiopoda will serve for at once recognizing the genus. It comprises 3 

 northern species, all of which belong to the fauna of Norway, and will be 

 described below. In addition to these, the Rev. Mr. Stebbing has added 2 

 new species from the Challenger Expedition. 



15. Photis Reinhardi, Kreyer. 



(PL 202). 

 Photis Reinhardi, Kroyer, Nat. Tidsskr. 1 R. Bd. IV, p. 155. 



Syn: Amphithoe pygrnsea, Lilljeborg. 

 Amphithoe Reiuhardi, Goes. 



Body comparatively stout and rather deep, with broadly vaulted 

 back. Cephalon not nearly attaining the length of the tirst 2 segments of 



