486 



folded five timeSi the distal segment longer. Pereopods I and II are sim- 

 ple, with a short and strongly broadened 2nd segment. The claws are 

 large, especially of pereopods II, and almost equal in length to the 6th 

 segment. The 2nd segment of pereopods V and VI is broadened but not 

 operculiform. Pereopods VII have a full complement of segments and 

 well-developed claws. The margins of the basipodites of the uropods are 

 not denticulate; the endopodites of uropods II and III are not fused with 

 the basipodites. The telson is small, with an acute tip. 

 Type species: Tryphana malmi Boeck, 1870. 



1. Tryphana malmi Boeck, 1870 (Fig. 212) 



Boeck, 1870: 9; Stephensen, 1923: 36; Schellenberg, 1927: 654. 

 —nordenskioldi Bovallius, 1887a: 30. —boecki Stebbing, 1888: 1539. 



Length of sexually mature females up to 6 mm, of males up to 

 5 mm. 



The head in males is 1.5 times, in females 1.2 times as high as 

 the pereon; in males the head is slightly but noticeably narrowed ante- 

 riorly. Antennae I in females have a two-segmented flagellum, the 1st 

 segment of which is armed with a few long apical spines; the 2nd seg- 

 ment is slightly shorter than the 1st, narrow, and armed with two apical 

 setae. Antennae I in males have a three-segmented flagellum in which 

 the length of the basal segment does not exceed its width, and the pos- 

 terior surface is highly bulged and densely covered with fine long hairs; 

 the 2nd segment is straight and narrow, with a long and pointed posterior 

 distal process; the 3rd segment is very thin and bears three long setae at 

 the base, which reach the tip of the distal process. The basal segment of 

 antennae II in males has bulged margins and the distal segment is 1/3 

 the length of the preceding one. 

 394 The 2nd segment of pereopods I has an almost straight posterior 



margin and a greatly bulged anterior margin so that the length and width 

 of the segment are almost equal; the 3rd and 4th segments are short; 

 the 5th segment is broadened and has a bulged anterior margin; the 6th 

 segment narrows distally, its margins are armed with spines and setae, 

 and the posterior distal angle forms a denticulate process; the claw is 

 denticulate and pubescent and half the length of the 6th segment. The 

 2nd and 5th segments of pereopods II are narrower than in pereopods I; 

 the claw is strong and long, equal to the 6th segment in length, and 

 densely covered with small spines. The 2nd segment of pereopods V is 

 1.5 times longer than wide and both its margins bulged, more so in the 

 distal part; the 4th and 5th segments are broad; the 5th and 6th segments 

 have a denticulate anterior margin; the claw is generally not less than half 

 the length of the 6th segment. Pereopods VI are identical to pair V in 

 structure but the 2nd segment is oval and the distal segments are smaller. 

 Pereopods VII consist of an oval 2nd segment and well-developed distal 



