155 



examination, be confounded with them. It is, however, undoubtedly a distinct 

 species, chiefly characterised by the dentiform projection of the 3 anterior 

 pairs of coxal plates, and Ijy the form and armature of the basal joint of 

 the last pair of pereiopoda. I have formerly confounded this species with 

 •H. serrata to be next described. 



Occnrrence. — Oif the soutli and west coast of Norway, this species is 

 by no means rare, occurring, as a rule, in company with H. negleda. It extends 

 niirtliwards to Tromso, Finmark, where it lias been collected rather sparingly 

 by Mr. Schneider. 



Dinfrihution. — Coast of Bohiislan (Stockholm Museum). 



7. Harpinia serrata, G. 0. Sars. 



(PI. 64, fig. 1). 

 Harpinia serrata, G. 0. Sars, Crust. & Pycnogonida nova etc. No. 21. 



Body unitsually robust and rather tumid, with broadly vaulted back. 

 Cephalon liut slightly exceeding in length the 3 anterior segments of meso- 

 some combined, hood rather convex above, with blunted tip. Coxal plates 

 large and broad, without anj' dentiform projection, but with a much greater 

 niunber of marginal setae than in most other species; 1st pair considerably 

 widening distall3^ ; 5th pair with the jjosterior lobe very deep, reaching nearly 

 as far down as the preceding jiairs. Metasome densely hairy above, last pair 

 of epimeral ])lates produced to a slightlj- upturned spiniform projection. 

 Superior antennae with the 1st joint of the peduncle very large and thick, 

 nearly twice the length of the other 2 combined, flagelhim comparatively 

 short and 5-articnlate, accessory appendage 4-articulate. Inferior antennae 

 likewise rather strong and of the usual structure, flagellum shtirt and 5-arti- 

 culate. Gnathopoda rather jjowerful, hand oval, with the palmar edge about 

 as long as the hind margin. Penultimate pair of pereiopoda very slender 

 and considerably exceeding half the length of the body; last pair with the 

 basal joint obliqiiely oval, posterior expansion reaching bej'ond the meral 

 joint, edge divided into 5 very large and regular, posteriorly-pointing serra- 

 tions. Last pair of uropoda with the inner ramus scarcely more than half 

 as long as the oiiter, and bearing 2 unequal setae at the tip, outer ramus 

 rather slender, with 4 spines exteriorly, tei'minal joint extremely small, but 

 tipped by 2 rather elongated and slender setae. Lobes of telson obtusely 

 truncated at the tip. Colour greyish white. Length of adult female 6 mm. 



Remarks. — The present form may be easily distinguished from any 

 of the other species l^y its unusually short and pulpy body, and by the 

 very coarse and regular serrations of the basal joint of the last pair of 



