KONCtL. sv. vet. akademiens handlingar. band. 22. NIO 7. 67 



nera we have dealt with above. As valuable specific characteristics within the, genus Mi- 

 monectes I do point out, the form of the flagellum of the first pair of antennse, the shape of 

 the metacarpus of the first two pairs of peraäopoda, the uropoda and their armature, and, 

 curiously enough, the form of the ovitectrices. The first and last of these characteristics 

 I do not find to be of any value, worth to mention, within the other Hyperiidean genera; 

 the characteristics derived from the form of the uropoda, on the other hand, seem to be 

 of specific value through the whole group. 



The integument of the body is thinner and more transparent than in the preceding 

 species, showing a similar hexagonal plating in many parts of the body, but the hexa- 

 gonal cells are distinctly more oblong than in Mimonectes Lovéni. 



The head is as broad as high, and about four times as high as long; it is higher 

 than a third of the length of the diameter of the globe. 



The ocelli ai'e six in number on each side. 



The first pair of antennce (Pl. VI, fig. 2) ai-e fixed as in the preceding species. 

 The peduncle is two-jointed, the first joint is stout, linear, more than twice as long as 

 the second. The first joint of the flagellum is very long, narrow, cylindrical, bluntly 

 serrated along the upper and under margins, four to six times as long as the whole 

 peduncle, the apex is truncated, not projecting as in the preceding species; thereafter 

 follow three small, cylindrical joints, the last the longest and narrowest, all armed with 

 delicate hairs. In the female the first pair of antenns; are shorter than in the male. No 

 glands are to be seen within the flagellar joints. 



The second pair of antennw (Pl. VI, fig. 3) are shorter than the first joint of the 

 peduncle of the first pair. The basal joint forms a rounded tubercle, not distinctly arti- 

 culating with the surface of the head. The second and thii'd joints are slender, cylin- 

 drical, subequal in length; the fourth joint is somewhat longer than the third, tapering. 



The mouth-organs are similar to those in the preceding species. 



The perceon. The top of the globe is formed by the second and third segments. 

 The second segment is longer than the first; the third is the longest of all, the sixth is 

 the shortest of the segments forming the globe, and not as high as the first segment. The 

 seventh segment is normal, not inflated, and not half as long as the sixth segment. The 

 almost circular under surface of the globe is bordered by the under margins of the head 

 and the first six pera^onal segments. 



The epimerals of the first and second pairs are a little shorter than the segments, 

 that of the third pair is the deepest of all but scarcely half as long as the under margin 

 of the third segment; that of the fourth pair is half as long as the segment, that of the 

 fifth pair equals the whole length of the under margin of the segment, that of the 

 sixth pair is half as long, that of the seventh a third as long as the under margin of the 

 corresponding segment. 



The branchial säcks (Pl. VI, fig. 5) are more elongated and narrow than in the 

 preceding species, attached to the second to sixth pairs of perseopoda; they are scarcely 

 longer than the femora of the corresponding legs; that of the second pair is about four 

 times as long: as broad. 



