154 



hood of the cephalon, and by the peculiar lanceolate lappet to which the post- 

 antennal corners are drawn out ; furthermore, by the densely hairy metasome, 

 the more oblique form of the hands of the gnathopoda, the greater length of 

 the penultimate pair of pereiopoda, and by the form and armature of the 

 basal joint of the last pair; finally, by the rather different structure of the 

 last pair of uropoda, The Plioxus plumosus of Sp. Bate is undoubtedly this 

 species, as also that recorded under the name Harpinia pliimosa by most sub- 

 sequent authors. The form described by Meinert as Harpinia antennaria seems 

 to be the adult male of this species. His specific name cannot, however, be 

 retained, as it is based only on a sexual characteristic. 



Occurrence. - - Of all the species of Harpinia this is by far the com- 

 monest. I have met with it in numerous localities along the whole coast of 

 Norway, from the Christianiafjord to Vadso, in depths varying from 30 to 

 150 fathoms, muddy bottom. 



Distribution. British Isles, Shetland Isles, Bohuslan, Kattegat, coast 

 of France. 



6. Harpinia pectinata, G-. 0. Sars, n. sp. 



(PI. 53, fig. 2). 



Body comparatively more slender and compressed than in the 2 prece- 

 ding species, and quite glabrous above. Cephalon about the length of the 4 

 anterior segments of mesosome combined, hood considerably projecting beyond 

 the peduncle of the superior antennae, postantennal corner not produced. The 

 3 anterior pairs of coxal plates exhibiting, each at the infero-posteal corner, a 

 small but distinct dentiform projection, setae "of the distal edge fewer in 

 number than in the preceding species. Last pair of epimeral plates of meta- 

 some produced to a rather short spiniform process. Antennae comparatively 

 slender, otherwise very similar in structure to those in the 2 preceding species. 

 Hands of the gnathopoda oblong oval, palmar edge about the length of the 

 hind margin. Penultimate pair of pereiopoda rather slender, and about half 

 the length of the bod}'-; last pair with the basal joint obliquely expanded so 

 as to project beyond the meral joint, posterior edge divided into 5 G verv 

 coarse serrations pointing downwards. Last pair of uropoda comparatively 

 small, and somewhat resembling in structure those in H. pluwosa, except that 

 the outer ramus has a smaller number of spines. Lobes of telson very small, 

 obtusely rounded at the tip. Adult male very like that of H. neglecta, but 

 considerably smaller. Colour greyish white, pellucid. Length of adult female 

 scarcely exceeding 4 mm. 



Remarks. - - Also this form exhibits in its outward appearance so close 

 a resemblance to the 2 preceding species, that it may easily, without a closer 



