561 



forming on either side of the tip a distinct angle armed with a single spine. 

 Body whitish, more or less mottled with a dark brown pigment, especially 

 accumulated aroiind the intestine, coxal plates, as a rule, witliout any 

 pigment. Length of adult female 6 mm, of male about the same. 



liemarlcs. — As above stated, this form was erroneously identified by 

 Boeck with G. mjtliroplithalma of Lilljeborg, from which species it is at once 

 distinguished by the dark pigment of the eyes. It also differs in tlie 

 strong spiniform projection of the anterior lip, the form of the last pair of 

 epimeral plates of metasome, and finally, in the structure of the gnathopoda 

 and pereiopoda, as also in the colour of the body. 



Occurrence. — Off the coast of Norway, this species is much more 

 frequently found than the preceding one. I have met with it in numerous 

 places both on the south and west coasts, as also in the Trondhjemsfjord, in 

 moderate depths varying from 20 to 50 fathoms. It extends northwards along 

 the Nordland coast up to Finmark, having been collected by Prof. Collett at 

 Nordkap, and by myself at Mehavn and Vardo. 



DistrihuHon. — Kattegat (Meinert), Greenland (Hansen). 



12. Gammaropsis nana, G. 0. Sars, n. sp. 



(PI. 199, fig. 2). 



Body moderately slender, and somewhat compressed. Cephalon fully 

 as long as the first 2 segments of mesosome combined, lateral corners produced 

 to a very shai-p and straight point. Anterior pairs of coxal plates much 

 deeper than the corresponding segments, and successively increasing in size 

 to the 4th; 5th pair with the anterior lobe very deep, and obtusely ti-uncated 

 at the tip. Last pair of epimeral plates of metasome not acutely produced 

 at the lateral corners, posterior edge slightly curved. Eyes comparatively 

 large, and rounded in form, pigment dark brown. Antennae less densely 

 setiferous than in the 2 preceding species, the superior ones not nearly attain- 

 ing half the length of the body, 1st joint of the peduncle compai'atively 

 short, 2nd a little longer than the 3rd, flagellum not attaining the length of 

 those joints combined, and composed of only 5 or 6 articulations, accessory 

 appendage shorter than the last peduncular joint and very narrow, consisting 

 of 2 or 3 articulations, the last of which is very small. Inferior antennae, 

 as usual, a little shorter than the superior, and having the flagellum about 

 half the length of the peduncle. Anterior lip but slightly produced in front. 

 Anterior gnathopoda with the propodos somewhat longer than the carpiis, and 



