KONGL. SV. VET. AKADEMIENS HANDLINGAH. BAND. 22. N:0 7. 



83 



Genus 2. HYPEROCHE, c. BOVALLIUS, 1887. 



Metoecus, 



Diagll. Capul inagnum ferc globosum. Perceoii leve, ejjiiiieria distinctis instruotum. Petles periri 

 primi et secundi pariuni cheliformes, earpus dilatatus et valde productus, processus carpi 

 compressus, cultriformis. Carpus peduni tertii ac quarti pariuin paullo dilatatus. Pedes 

 parium trium ultimorum longitudine subiequales, duobus praicedentibus non vel paullo 

 longiores. Pedes uri mediocres, non elongati. 



The head is large, almost globular. The peraon is smooth, with distinct epimerals. The 

 first and second pairs of perceopoda are cheliform, the carpus is dilated and very produced, 

 the carpal process is compressed, knife-shaped. The carpus of the third and fourth pairs 

 is somewhat dilated. The last three pairs are subequal in length, not, or only a little 

 longer than the two preceding pairs. The uropoda are mediocre, not elongated. 



Syn. 1838. Metoecus, H. KEOEYER. — »Grönlands Arafipoder». Det Kongl. Danske 



Videnskabs-Selskabs Naturvidensk. ogMa- 



themat. Afhandlinger. Deel. 7, p. 288. 

 H. MiLNE Edwards. 1840. Histoire Naturelie des Crustaoés Torne 



3:me, p. 78. 

 J. D. Dana. 1852. UnitedStatesExploringExpedition. Crnsta- 



cea. Vol. 2, p. 981 and 1442. 

 A. VVhite. 1837 . A populär History of the British Crusta- 



cea, p. 207. 

 A. BoECK. 1870. »Crnstacea amphipoda borealia et arctica». 



Christiania Videnskabs-Selskabs Forhandl. 



for 1870, p. 86 (6). 

 « 1872. De Skandinaviske og Arktiske Äinphi- 



poder, p. 82. 

 G. O. Särs. 1882. »Oversigt af Norges Crustacéer med fore- 



]0bige Bemserkninger över de nye eller 



mindre bekjendte Arter». Christiania 



Videnskabs-Selskabs Forhandl. for 1882, 



p. 19 and 75. 

 — »Systematical list of the Amphipoda Hy- 



periidea». Bih. t. K. Sv. Vet. Ak. Handl. 



Bd. 11. N:o 16, p. 17. 

 » » — 1887. »Arctic and Antarctic Hyperids». Vega- 



Exp. Vetensk. Iakttagelser. Bd. 4, p. 563. 

 » » Th. Stebbing. 1888. »Report on the Amphipoda». Voy. of 



H. M. S. Challenger. Zoology. Vol. 



29, p. 1398. 



When H. Kroeyer in 1838 established the genus Metoecus, he gave the following 

 generic diagnosis: 



»Pedes primi et secundi paris reliqvis permulto breviores, sed validi, nianuqve 

 armati cheliformi. Ariiculus horutn peduni quarius, qvi forma prasditus est triangu- 

 lari, nianum efficit, a cujus margine inferiori prodeunt pollex biarticularis anterior et di- 



1872. {Tauria, DANA.) 



1887. Hyperoche, C. BOVALLIUS. 



