fied with Apseudes talpa of Montagu. Having, however, been enabled to examine 

 the latter species from Mediterranean specimens, I have convinced myself of its 

 distinctness from the Norwegian form. The latter grows to a much larger size 

 than the typical species, and has the body more strongly spinous, differing more- 

 over very conspicuously in the rudimentary condition of the eyes, which in A. 

 talpa, on the other hand is well developed, with dark pigment and distinctly 

 defined visual elements. 



Occurrence. — The species occurs along the whole coast of Norway, from 

 the Christiania Fjord to Vadso on a bottom consisting of loose muddy clay with 

 gravel or stones intermingled, the depth ranging from 30 to 150 fathoms. It is 

 a rather sluggish animal, concealing itself in the loose mud, so that at first it is not 

 easily caught sight of. In many cases, moreover, it is found to be so thickly 

 covered with mud adhering to the several spiniform projections of the body, and to the 

 setse issuing from them, that it is rather difficult to recognise. I have never 

 seen it make any attempt to swim, though the structure of the pleopoda would 

 seem to allow it, at least in a younger state, to move at times freely through 

 the water. 



Distribution. — Bolmslan (Lilljeborg); SSW of Ireland (Porcupine Expe- 

 dition) in a depth of 725 fathoms (Norman & Stebbing). 



Gen. 2. SphyrapUS, Norm. & Stebb., 1884. 



Generic characters. — Body less elongated than in Apseudes, though some- 

 what more slender in male than in female. Cephalosonie broadest behind and 

 gradually narrowed in front, upper face vaulted and less distinctly areolated, frontal 

 plate imperfectly defined at the base. Ocular lobes very small. First free segment 

 of mesosome rather broad, and firmly connected with the cephalosome, but not 

 coalesced with the same, coxal plates very small, not produced in the form of 

 spines. Metasome not very much elongated, terminal segment comparatively short. 

 Eyes wholly absent. Superior antennas with the 1st joint of the peduncle rather 

 large and flattened, accessory appendage small; flagellum in male with dense 

 bunches of sensory filaments. Inferior antenna? very slender and without any 

 scale-like appendage. Mandibles comparatively less strong than in A2)seudes, palp 

 very slender and only thinly setous. Chelipeds with the hand very large, sub- 

 malleolate, being set on at right angles to the carpus, the latter, as also the 

 naeral joint, much more elongated in male than in female. Fossorial legs in male 



