44 



CARL BOVALLIUS, AMPHIPODA HYPKRIIDEA. 



VIBILIDtE. 



Syn. 1830. Vibilia, H. MILNE EDWARDS. 



1840. Histoire naturelle des Crustaces. Tome 



3 me , p. 72. 

 Dana. 1852. United States Exploring Expedition. 



Crustacea. Vol. 2, p. 980. 

 Spknce Bate. 1862. Catal. Amph. Crust. Brit. Museum, p. 299. 

 Claus 1872. Grundziige derZoologie. 2te Aufl. p.236. 



C. Bovallius. 1887. "Arctic and Antarctic Hyperids. Vega- 



Exp. Vetensk. lakttagelser. 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. Peroui. 



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

 laminar. 

 aaaa 1. The flagellum of the first pair of antenna? is a 



little longer than the head S.V.Jeaugerartli 



aaaa 2. The flagellum of the first pair of antennae is much 



longer than the head 3. V. aftiuis. 



aa 2. The eyes are very large 4. V. macropis. 



a 2. The head is not rostrate. 



aa 3. The pereional -segments are dorsally humpy 5. V. gihbnsa. 



aa 4. The pereional segments are dorsally smooth. 



aaa 3. The fifth and sixth pairs of pereiopoda are scarcely longer 

 than the third and fourth pairs. 

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



broad _ _ 6. V. robiista. 



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. Kroeyeri, 



aaa 4. The fifth and sixth pairs of pereiopoda are more than a 

 third longer than the third and fourth 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. lougipes. 



aaaaa (>. The metacarpi of the fifth and sixth 

 pairs are as long as the two pre- 

 ceding joints 10. V. Eihvardsi. 



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



as long as the metacarpi 11. V. riatrix. 



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. 



