39 



broader than the succeeding ones, accessory appendage only very little 

 shorter than the flagellum, 5-articulate ; those of male much more mas- 

 sive, peduncle greatly swollen, with the 2 outer joints nearly as broad 

 as the basal one, 1st joint of the flagellum very large and eompbi 

 nated, with the inferior edge arched and densely beset willi delicate and 

 slender sensitive hairs. Anterior gnathopoda with the propodos about as 

 long at the carpus, dactylus rather short. The 3 posterior perei<>| ( <ida 

 nearly uniform in length, or the penultimate one a little longer, basal joint 

 very large, rounded quadrangular, meral joint, especially in the '2 anterior 

 pairs, greatly dilated. Penultimate pair of uropoda with the ba.-al part mneli 

 broader than that of the preceding pair and forming at the end posteriorly 

 an angular corner; last pair scarcely half as long as the preeeding pair, rami 

 lanceolate, unarmed, the outer one the longer. Telson almost as broad as long. 

 rounded, and cleft beyond the middle, Colour pale orange with light red 

 pigmentary bands across the segments. Length 5 mm. 



Remarks. - The form described by the author from the North Atlantic 

 Expedition as Aciflostouia l.aticome is the male of a nearly related species, 

 which differs, in addition to its much larger size, in the total want of eyes and 

 in a somewhat different form of the last pair of uropoda and of the telson. 

 A female specimen of the same species, measuring 11 mm in length, was also 

 obtained on the Expedition, but was wrongly referred to the typical form. 

 On the coast of Norway this abyssal species has not yet been found; for the 

 specimen named so in my 0versigt af Norges Crustaceer I find on closer 

 examination to be more properly referable to the typical species. 



Occurrence. - I have met with the present form rather sparingly on 

 the south and west coast of Norway at moderate depths, from 20 to f>l) 

 fathoms. Prof. Lilljeborg has taken it at Molde and Boeck at Haugesundj 

 finally Dr. Liiidstrom has procured the species at Farsund. 



Distribution. - Coast of Bohuslehn, British Islands, Shetland. 



Gen. 6. Ichnopus, Costa, 1853. 



Body rather slender and compressed, with the coxal plates of moderate 

 size. Both pairs of antennae with the fiagella unusually elongated and com- 

 posed of numerous short articulations. Anterior lip slightly projecting anteriorly 

 as a short rounded lobe, defined from the epistome by a narrow incision. 

 Posterior lip strongly chitinised, with very slender and projecting 

 corners. Mandibles rather strong, cutting edge broad, accessory Lobe narrowly 

 rounded and separated from the latter only by a small sinus, palp originating 



