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



197 



9. HYPERIA FERA, J. D. DANA, 1852. 



Hyperia fera, Dana. 

 Facsimile from Dana, U. S. Expl. Exp. Crust. II, pi. 67, tig. 60 — 6</. 



Fig. 1. The animal from the side. 2. The first pair of antennae. 3. The maxillipeds. 4. The urus. 



Diagn. Caput magnum, segmentis quinque primis peraei paullo brevius. Segmenta omnia pei'cei libera. 

 Pedes percei primi paris pedibus secundi paris breviores. Pedes tertii ac quarti parium 

 pedibus secundi paris plus quam duplo longiores. Pedes parium trium ultimorum duobus 

 prrecedentibus paullo longiores; dactylus dimidium metacarpi longitudine rcquans; carpus 

 pedum quinti paris tibia non longior. Latera segmentorum plei post rotundata. Pedun- 

 culus pedum uri ultimi paris plus quam duplo longior quam latior. Telson segmento ul- 

 timo uri brevius, ac dimidio pedunculi pedum uri ultimi paris multo brevius. 



The head is large, and only a little shorter than the first five perasonal segments together. 

 All the pergonal segments are free. The first pair of perazopoda are shorter than the 

 second pair. The third and fourth pairs are more than twice as long as the second pair. 

 The last three pairs are somewhat longer than the two preceding pairs; the dactylus 

 is half as long as the metacarpus; the carpus of the fifth pair is not longer than the tibia. 

 The lateral parts of the pleonal segments are rounded behind. The peduncle of the last 

 pair of uropoda is more than twice as long as broad. The telson is shorter than the last 

 ural segment, and much shorter than half the peduncle of the last pair of uropoda. 



Colour. "Brownish, or brownish red in irregular spots, partly colourless; basal joints of six posterior 

 legs, brownish red.» (Dana.) 



Length. About 3 mm. »One-eighth inch.» (Dana.) 



Hab. The tropical region of the Atlantic: »Lat. 2° N. to 1° S., Long. 18° to 17° W.» (Dana.) 



Syil. 1852. Lestrigonus ferns, J. I). DANA.' 



Hyperia /era, 



— United States Exploring Expedition. Crusta- 



cea. Vol. 2, p. 982, pi. 67, fig. 6a— 6d. 



Spence Bate. 1862. Catal. Amph. Crust. Brit. Museum, p. 291, 

 pi. 48, fig. 7. 



C. Bovallius. 1887. "Systematical list of the Amphipoda Hy- 

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

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



