44 CARL BOVALLIUS, AMl'niI'OIM HYrKIUI)>EA. ' VlHlLilJAi. 



Syn. 1830. Viln/id. H. MILNE K1)WARJ)S. — /S4n.. Uhiow naturrllc des Cm.staces. Torne 



:!""=, p. 72. 

 » » » Dana. 1852. United States Expluriiip Expedition. 



Crustacea. Vol. 2, p. 980. 

 )) » » Spknce Bate. 1862. Catal. Ainph. Crust.Brit. Museum, p. 299. 



» I) » Claus 1872. Gruudzuge derZoologie. 2te Aufl. p. 2.36. 



» » u C. BovALLlus. 1887. »Aretic and Antarctic Hyperid.s. A'ega- 



Exp. Vetensk. Iakttagelser. Bd. 4, 



p. 554. 



A. The hinder corners of the last ural segment are not produced. 

 a 1. The head is rostrate. 



aa 1. The eyes are middle-sized. 



aaa 1. The femora of the fifth and sixth pairs of pereiopoda are 



cylindrical 1. V. Peroni. 



aaa 2. The femora of the fifth and sixth pairs of pereiopoda are 

 laminar. 

 aaaa 1. The tlagelluiu of the fii'st pair of antenns is a 



little longer than the head .. 2.V.Jeaugerartli. 



aaaa 2. The Hagelluui of the first pair of antennte is much 



longer than the head .._ 3. V. aftiuis. 



aa 2. The eyes are very large _ 4. V. luacropis. 



a 2. The head is not rostrate. 



aa 3. The pereional segments are dorsally hiiinpy 5. V. gihbosa. 



aa 4. The pereional segments are dorsally smooth. 



aaa 3. The fifth and sixth pairs of pereiopoda are scai-cely longer 

 than the third and fourth pairs. 

 aaaa 3. The femora of the first and second pairs are very 



broad ..- 6, V, robusta. 



aaaa 4. The femora of the first and second pairs of pe- 

 reiopoda are narrow. 

 aaaaa 3. • The peduncles of the uropoda are 



shorter than the rami 7. V. borealis. 



aaaaa 4. The peduncles of the uropoda are 



longer than the rami. 8. V. Kroejeri, 



aaa 4. Tlie fifth and sixtli pairs of pereiopoda are moi-e than a 



third longer than the third and fourtli pairs. 



aaaa 5. The dactyli of the third and fourth pairs are 



shorter than the metacarpi. 



aaaaa 5. The metacarpi of the fifth and sixth 



pairs are shorter than the two pre- 



ceding joints.. 9. V. longipes. 



aaaaa <>. The metacarpi of the fifth and sixth 

 pairs are as long as the two pre- 



ceding joints 10. V. Eilwardsi. 



aaaa 6. The dactyli of the third and fourth pairs are 



as long as the metacarpi 11. V. Tiafrix. 



B. The hinder corners of the last ural segments are produced backwards. 



b 1. The peduncles of the last pair of uropoda are longer than the rami. 



