KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 327 



perreopoda, and the numerous, red-brown, star-like pigment-spots on the sides of the 



pergonal segments. 



In 1885 Carus gave the following diagnosis in Latin: 



»Articulis basalis antenna? utriusque, labiumque superius aculeis instructa; latera segmen- 

 torum raaculis stellatis fusco-rubris; femora I et II angulatim eurvata.» 



From my own examination of fresh specimens I give the following details: 



The female. 



The forepart of the body is thick, and inflated, the hind part is very narrow and 

 slender. The head and peraeon together are longer than the pleon and urus together. 



The head is broader above than below; the antennal groove commences above the 

 middle of the front side, and is long and narrow. The head is only a little longer than 

 the first two perseonal segments together, and is considerably broader than the peraeon. 



The first pair of antenna? (PL XIV, fig. 31) are longer than the head, but shorter 

 than the head and the first two pergonal segments together. The peduncle consists of a 

 single joint; the inner lower corner is produced into a long, spine-like process, which is 

 considerably longer than the rest of the peduncle. The single flagellar joint is much 

 longer than the peduncle with the process; it is broad at the base, thereafter more slender, 

 nearly cylindrical, and broadly rounded at the apex; on the sides there are a few short 

 projections tipped with hairs. 



The second pair of antenna? (PI. XIV, fig. 32) are scarcely longer than the stem 

 of the peduncle in the first pair. The first free joint of the peduncle is twice as broad 

 as long; the second joint is more than three times as long as the first, tapering towards 

 the apex, and perfectly smooth; the single flagellar joint is elongate-conical, nearly as 

 long as the whole peduncle, and is tipped with a few short hairs. 



The mouth-organs are like those in Phronimopsis Sarsi; a tree-jointed mandibular 

 palp is present. 



The per aeon is about three times as long as the head, and is as long the whole pleon. 

 The first two segments are dorsally coalesced, the second being more than twice as long- 

 as the first; the third and fourth are equal in length; the following increase in length, 

 and show a very short spine-like projection dorsally in the median line. The epimerals 

 are fused with the segments. The perceon is, at the middle, more than four times as 

 broad as the pleon. 



The branchial sacks are considerably shorter than half the femora of the correspond- 

 ing pairs of perasopoda. 



The first pair of perasopoda. The femur is narrow, angularly bent, and as long 

 as the three following joints together. The carpus is longer than the two preceding 

 joints together, and has the hind margin smooth. The metacarpus is scarcely longer 

 than the carpus, with a few short spines on the hind margin. The dactvlus is hirsute, 

 and like that in Phronimopsis Sarsi. 



The second pair are in shape exactly like that pair in Ph. Sarsi, but have the meta- 

 carpus much larger; hanging straight down the second pair reach fully to the apex of 



