6 CAEL BOVALLIUS, AMPHIPODA HYPERIIDEA. 1. 2. CYLLOPODID^. 



together; the hinder margin not excavated. Tiie lateral parts of the pleonal segments 

 are rounded, serrated. The second and third ural segments are free, not coalesced. The 

 peduncle of the first pair of uropoda is rather shorter than the rami, the peduncle of 

 second pair is as long as the rami; that of the third pair is a little longer than the rami. 

 The telson is as long as a fourth of the length of the peduncle of the last pair of uropoda. 



Colour. Nearly colourless, a little red in the posterior segments, and in the uropoda. 



Length. 13 mm. 



Hilb. »Orange Bay, Tierra del Fuego, on the Fucus» (Dana.) 



Syn. 1852. Cyllopus magellaiiicus, DANA. United States Exploriiig Expedition. Cru- 



stacea. Vol. 2, p.* 990. Pl. 68, fig. 1. 

 » » » C. BovALLius, 1887. »Arctic and Antarctic Hyperids». Vega-Exp. 



Vetensk. Iakttagelser. Bd. 4, p. 555. 



The unequal size and depth of the epimerals is a good characteristic of this species; 

 another characteristic is the great length of the rami of the last pair of uropoda. 



From the description of Dana I transcribe further: 



The head is almost tilled with the pigment. 



The pigment of the eyes is black in the mäss, but when pressed out, a deep reddish 

 purple. 



The first pair of antennw are a little shorter than the second pair; the first 

 joint of the flagellum is long, acuminate, ciliate below, and following this there are two 

 minute joints. 



The second pair are seven-jointed, the articulation between the third and fourth 

 joints is oblique; the fourth joint is longer than the third, the lifth is the longest, the sixth 

 and seventh short and equal. 



The laandihle has a lateral process for manducation, which has a spinous surface; 

 the palpus is slender three-jointed, the second joint the longest, the third a little shorter, 

 the first quite short. 



The epimerals of the fourth pair are the largest. 



The first two pairs of pereiopoda are terete (fem ur excepted), the carpus and 

 metacarpus are subequal in the first pair, but in the second the metacarpus is much 

 the longest. The dactylus is short, nearly straight. 



The third and fourth pairs are a little stouter than the following pairs, the femur 

 broad laminar. 



The fifth and sixth pairs are long and slender. Femur oblong, finely serrulate 

 along the anterior margin, the metacarpu.s is delicately serrulate along the anterior 

 margin. The dactylus equals a third of the length of the metacarpus. 



The third ural segment is almost twice as long as the second. 



The peduncle of the second pair of uro'poda reaches almost as far as that of the 

 first pair. The rami of all the three pairs are lanceolate, sharp-pointed, sparingly serrated. 

 Those of the last pair are only a little shorter than the peduncle (6:7). 



