112 OARL BOYALLItIS, AMPHIPODA HYPERIIDEA. I. 2. HYPERIIDJ5. 



Hyperoche picta. 



lug a spoon-shaped process; the carpal process is broad, not serrated, fringed with spines; 

 it is much shorter than the hind margin of the metacarpus. The carpus of the third and 

 fourth pairs is scarcely dilated; the hind margin is straight, not serrated, set with very 

 minute spines, the lower corner is not produced. The last three pairs are not longer than 

 the two next preceding pairs; the femur is narrow; the metacarpus is mediocre, shorter 

 than the metacarpus of the third and fourth pairs. The first pair of urdpoda do not reach 

 to the apex of the last pair; the outer ramus is as long as the inner. The telson is half 

 as long as the peduncle of the last pair of uropoda. 



Colour. Yellowish white, with round and star-like spots of a bright red. 



Length. 4 mm. 



Hab. The tropical region of the Atlantic, at Lat. 20° N., and Long. 39° W. One specimen, a 

 male, captured by the author during the expedition of H. Swed. M:ty's Corvette Balder, 

 in 1881. (S. M.) 



Hyperoche picta differs in man} 7 points from the other species of the genus but 

 the building of the carpal process of the first two pairs of pera^opoda, and the form of 

 the urus do allow its introduction in the genus Hyperoche. The shape of the carpus of 

 the third and fourth pairs of pera>opoda is, however, more similar to the shape of that 

 joint in the genus Hyperia. 



The body is comparatively slender, but the person is distinctly broader and more 

 tumid than in the male of Hyperoche I/ueikeni. 



The head is large, tumid, as long as deep, and nearly as long as the first three 

 pergonal segments together. The antennal groove commences a little above the middle 

 of the front side of the head, and is very broad, comparatively broader than in any of 

 the other species of Hyperoche. 



The eyes occupy the whole surface of the head, the pigment has a deep reddish 

 colour. 



The first pair of antenna? are almost as long as the whole body. The first joint 

 of the peduncle is stout and thick, three times as long as the two following joints together. 

 The first joint of the flagellum is very large and thick, tapering towards the apex, the inner 

 and under sides are bulging, and closely set with long olfactory hairs; the first joint is 

 about three times as long as the whole peduncle; the second flagellar joint is very short, 

 the third twice as long as the second, the fourth still longer but narrower; the fifth to seven- 

 teenth joints are nearly equal in length, slender, cylindrical, very elongated, about fifteen 

 times as long as broad, and sparingly set with minute hairs; the last five joints are rapidly 

 decreasing in length, the last one being only three times as long as broad, tipped with 

 two very minute hairs. 



The second pair of antennre are considerably shorter than the first pair. The first 

 visible joint of the peduncle or the true third joint is very short, the fourth is twice 

 as long, the fifth or last peduncular joint is much longer than the preceding joints together, 

 cylindrical. The flagellar joints are slender, elongated, cylindrical, about ten times as long 

 as broad; they are fifteen in number, smooth, without hairs. 



