153 



was aware of some tlifFerences in the specimens examined b}- him, speaking, 

 as he does, of a sonthern variety. 



Distrihiifion. — Arctic Ocean: (xreenhmd, Spitsbergen, Nova Semla, 

 the Kara Sea, the Siberian Polar Sea; east coast of North America. 



5. Harpinia neglecta. (1. 0. Sars, n. sp. 



(PI. 53, i3g. 1). 

 Syn : Plioxiis iiluniosus, Sp. Bate and most other authors (but not Kroyer). 

 » Harpinia anteunaria, Meinert (male). 



In general appearance very like the ])receding species, but of somewhat 

 smaller size. Hood of cephalon more produced and reaching considerably 

 beyond the peduncle of the superior antenna^, postantennal corner drawn out 

 to an anteriorly-pointing lanceolate lajipet. Metasome densely hairy above, 

 last pair of epimeral plates produced to a spiniform process, which however 

 is somewhat shorter than in the preceding species. Coxal plates and antennae 

 almost exactly as in that species. Hands of the gnathopoda obliquely oval, 

 palmar edge longer than the hind margin. Penultimate pair of jjereiopoda 

 rather elongated, exceeding lialf the length of the bodj-; last pair smaller than 

 in H. plumom, basal joint obliquely heart-shaped with the posterior expansion 

 not reaching to the end of the meral joint, edge regularly sei'rated, serrations 

 about '.t in number, and rather small, though well defined, and having between 

 them short liairs. Last pair of uropoda considerabl}' more slender than in 

 H. pliimosa, inner ramus shorter than the basal joint of the outer, and bearing 

 a single apical bristle, outer ramus with 4 spines exteriorly, terminal joint 

 very small, considerablj' less than half the length of the basal one, and tipped 

 by a slender spine. Lobes of telson a little more elongated than in the pre- 

 ceding species and narrowly rounded at the tip. — Adult male more slender 

 than the female, and having the metasome rather powerful and glabrous above. 

 Last pair of epimeral plates with the spiniform process shorter than in female. 

 Antennae exhibiting the sexual characteristics very distinctly. Oral parts 

 imperfectly developed. (Tuathopoda more feeble than in female, hand of the an- 

 terior ones showing no trace of the thvxmb-like projection, nor of any palmar 

 spine. Last pair of pereiopoda with the basal joint more regularly oval, mar- 

 ginal serrations nearly obsolete. Last pair of uropoda with both rami very 

 nari'ow and nearly equal-sized. Colour grejash white. Length of adult fe- 

 male 5mm, of male somewhat less. 



Reniarlcs. — Although very like the preceding species in its outward 

 appearance, this form may, on closer examination, be readily distinguished by 

 several well-marked characteristics; thus by the comparatively more projected 



20 — Crustacea. 



