24 OAIiL liOVALLlUS, AMPIIIPODA nVPEHIlDEA. 



(lactylis ejusdem paris pedunculatis. Segnienta uri duo ultima coalita. Pedes uri angusti 

 miniit(! serrati; rami externi elongati, angusti, tertii paris diniidium pedunculi nequantes. 

 Rami interni primi paris pcdunculis longioros, secundi paris peduneulis multo breviores, 

 illi tertii paris pcjdunculos longitudine jvquantes. Telsoii elongatuin, ti'iangular(;. 



'IMie hodj is kccled, the lateral parts of tlie pereion provided with a distinct inargo. The 

 head is rostrate, almost twice as deep as long, with two divergent keels on the upper 

 side. The first pair of anterntw equal a fourth of the length of tiie body. The femora of 

 the first four pairs of pereiopoda are dilated, ovate. The fiftii pair are much longer tiiaii 

 the sixth; the anterior margin of the femur is smooth, the posterior margin spinously 

 serrated; the femur is mucli shorter than the tiiree following joints together; the apical 

 spine-liice process is curved, simple, a little longer than tiie genvi; the tibia is much longer 

 than the carpus; the carpus is a third longer than the metacarpus. The seventh pair equal 

 a third of the lengtli of the fifth pair; the dactyli of the seventh pair are pedunculated. 

 The last two ural segments are coalesced. The urop)oda are narrow, minutely serrated; 

 the exteriör rami are long and narrow; those of the third pair are as long as half the 

 peduncles. The interiör rami of the first pair are longer than the peduncles; those of 

 the second pair much shorter than the peduncles; those of the third pair are as long as 

 the peduncles. The telson is elongated, triangulär. 



Coloiir. Reddish white. 



Leilgtli. 5 mm., without the antennre 4 mm. 



Hab. Off Cape Horn; taken by the late Captain (jEOrge von Schi^ele. (U. M.). 



Syil. 1885. Tyro Tnllherrji, C. BOVALLIUS. »On some forgotten genera among tlie Amphipodous 



Crustacea». Bih. t. K. Sv. Vet. Ak. Handl. Bd. 10. 

 N:o 14, p. 15. 

 » » » 1887 . »Arctic and Antarctic Hyperidsu. Vega-Exp. Vetensk. 



Iakttagelser. Bd. 4, p. 532, pl. 40, fig. 4—10. 



It is a small delicate specios with micommonl)' well developed e5'es and slender legs. 

 Only the female is known. 



The hody is shorter and thicker than in the preceding species, with the dorsal side 

 feebly keeled from the head to the first ural segment. 



The anterior margin of the head projects into a very short, obtuse rostrum. 



The eyes (Pl. III, fig. 2) are comparatively large, quite as large as in Tyro margi- 

 nata, consisting of twelve hexagonal or pentagonal ocelli or rather groups of ocelli. 



The first pair of antennas (Pl. III, fig. 3) are short and .stout; the peduncle is 

 about a fourth of the length of the flagellum. The flagellum is three-jointed, the fir.st 

 joint is six ti mes as long as the last two together; the second joint is almost three tiraes 

 as long as tlie third, both ^\'ithout hairs. 



The pereion is very much arched, the fourth joint is the longest; the last three segments 

 are scarcely longer than the two preceding together; the lateral parts of the segments form 

 a margo, which is not, however, so prominent as in the preceding species. 



The four anterior pairs of epimerah are a little deeper than in Tyro mnrginata. 



