174 



with the flagellnm extremely slender, and only provided with very small hairs. 

 Inferior antennse in female half as long again as the superior ones, the 2 

 outer joints of the peduncle not very elongated and nearly equal-sized; those 

 in male fully attaining the length of the whole body. Anterior gnathopoda 

 considerably stronger than the posterior ones, propodos shorter than the 

 carpus, oblong oval, and somewhat dilated in its proximal part. Posterior 

 gnathopoda extremely slender, propodos linear, and somewhat exceeding half 

 the length of the carpus. Anterior pairs of pereiopoda about as in A. macro- 

 cepluda : the 2 succeeding pairs with the outer joints rather richly armed with 

 spines. Last pair of pereiopoda very similar in structure to those in A. typica, 

 though the basal joint appears comparatively a little smaller, and the dactylus 

 shorter. Last pair of uropoda likewise of much the same structure as in that 

 species. Telson very narrow and nearly smooth, excepting for 3 small marginal 

 spinules near the tip of each terminal lobe. Body semipellucid, light yellowish, 

 with orange-coloured shadows and specks, outer peduncular joints of the 

 antennae tinged at their tip with light reddish colour. Length of adult female 

 15 mm, of male somewhat less. 



Remarks. This pretty form, one of the largest of the indigenous 

 Ampeliscae *), may be easily recognized from any of the preceding species by 

 the much fuller development of the superior antennae. From the succeeding 

 species it is moreover readily distinguished by the structure of the last pair 

 of pereiopoda, and by the form of the last pair of epimeral plates of metasome. 



Occurrence. Though nowhere in any abundance, I have met with 

 this species in several localities, both off the south and west coasts of Norway, 

 and northwards to the Lofoten Isles (Rost), in depths, varying from 30 to 

 100 fathoms. 



Distribution. - Coast of France (Chevreux), Kattegat (Meinert), Bo- 

 huslan (Stockholm Museum). 



8. Ampelisca Eschrichtii, Kroyer. 



(PI. 61, fig. 1). 



Ampelisca Eschrichtii, Kroyer, Nat. Tidsskr. 1 R. Bd. IV, p. 155. 

 Syn: Ampelisca ingens, Stinipsou. 



Ampelisca dubia, Boeck (young). 



Ampelisca propinqva, Boeck (somewhat older). 



Cephalon scarcely attaining the length of the 3 anterior segments of 

 mesosome combined, frontal part gradually tapering, and transversely truncated 

 at the tip. First pair of coxal plates but slightly expanded distally, and 



*) Boeck states the length to be 30 mm, but this is certainly incorrect, and may most 

 probably be due to a misprint. 



