57 



Superior aiiteiiiiiP witli the 1st and 2n(l joints of the peduncle produced 

 anteriorly to l>lunt tootli-like projections; Hag'clluni in female only little, in 

 male nearly 4 times longer than the peduncle, 1st joint in female as long 

 as the remainder 10 joints combined ; accessory appendage scarcely longer 

 tlian the latter, 3-articulate. Inferior antennae in female more than twice the 

 length of the superior, in male ahoiit as long as the body, last joint of the 

 ])eduncle nearly twice the length of the penultimate one. Anterior gnatho- 

 poda with the basal joint as long as the meral and carpal joints combined, 

 propodos half the length of the former, palmar edge finely denticulated. 

 Dactylus of the pereiopoda scarcely more than half the length of tlie propodos. 

 Last pair of uropoda with the' rami aliont twice the length of the basal part, 

 terminal joint of the outer ramus very small. Telson nearly' twice as long 

 as broad, cleft beyond the middle, the incision very narrow in its anterior 

 part; tenninal lobes obtusely acvuninate, each with a small apical denticle 

 and another dorsal near their base. Body whitish, pellucid, with a few 

 orange-coloured pigmentary bands dorsally across the segments of the meta- 

 some. Length of female reacliing 14 nun., of male 11 mm. 



TteniarJis. — This form has been erroneously identified by Boeck and 

 most subsequent authors with Kroyer's Anonyx HolbiMi, which latter according 

 to the recent statements of Dr. Hansen is a very distinct species not occur- 

 ring i»ut of tlie arctic seas. The ]iresent s])ecies is easily distinguished both 

 from the said arctic form and from the succeeding new species by the strong 

 dentiform projections formed by the 2 first peduncular joints of the superior 

 antennaj and especially by the peculiar foi-m of the posterior projection of 

 the last epimeral plates of the metasome. 



Occurrence. — I have met with this form only on the south and west 

 coasts of Norway. It occurs in comparatively shallow water, from 6 to 20 

 fathoms, especially on sandy bottom, and buries itself with great dexterit}' 

 within the loose bottom-deposit. Occasionally it also descends to considerable 

 depths, 60 — 100 fathoms. 



Distribution. — Bohuslan, Denmark, British Isles, France, Mediterranean 

 (taken by the author at Naples). 



16. Hippomedon propinqvus, (t. 0. Sars, n. sp. 



(in. 21, lit;, h- 

 Very like the preceding species, but of somewhat smaller size. Lateral 

 corners of cephalon narrowly rounded at the tip. First pair of coxal plates 

 not nearly so strongly dilated as in Jf. <Iei/fin(}atiis, and scarcely broader 



