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



195 



8. HYPERIA AGILIS, J. D. DANA, 1852. 



3 -3= 



Hyperia agilis, Dana. 

 Facsimile from Dana. U. S. Expl. Exp. Crust. II, pi. 67, fig. 11, a— d. 



Fig. 1. The animal from the side. 2. Front-view of the head. 3. The second pair of antennae. 4. The seventh 

 pair of perseopoda. 



Diagn. Caput mediocre, segmentis duobu8 primis perasi longius. Segmenta omnia perm' libera. Carpus 

 pedum per cei primi paris dilatatus, paullo productus(?). Carpus pedum secundi paris productus; 

 margo anterior processus carpi dimidio marginis posterioris metacarpi non longius. Femur 

 pedum primi et secundi parium angustum; dactylus longus, rectus. Pedes tertii ac quarti 

 parium pedibus parium duorum praecedentium inulto longiores, spinis brevibus instructi. 

 Pedes parium trium ultimorum duobus praacedentibus longiores, spinis brevibus instructi; 

 carpus pedum quinti paris tibia longior, non serratus sed spinis paucis instructus. Latera 

 segmentorum plei post angulata. Pedunculus pedum uri ultimi paris plusquam duplo lon- 

 gior quam latior. Telson segmeuto ultimo uri brevius ac tertiam partem pedunculi pedum 

 uri ultimi paris longitudine non aequans. 



The head is moderately large, longer than the first two peraeonal segments together. All the 

 peraional segments are free. The carpus of the first pair of perceopoda is dilated, and a little 

 produced (?). The carpus of the second pair is produced; the front margin of the carpal 

 process is half as long as the hind margin of the metacarpus. The femur of the first two 

 pairs is narrow; the dactylus is long and straight. The third and fourth pairs are much 

 longer than the two preceding pairs, set with short bristles. The last three pairs are longer 

 than the two preceding pairs, and are set with short bristles; the carpus of the fifth 

 pair is longer than the tibia, not serrated, but set with a few short bristles. The lateral 

 parts of the phonal segments are angulated 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 not a third as long as the peduncle of the last pair of uropoda. 



Colour. "Mostly dirty purple, with purplish red in basal joints of legs.» (Dana.) 



Length. »Three to four lines. » (Dana.) 



Hab. »The Pacific, Lat. 41° South; Long. 76° 25' West. Collected several specimens, April 

 5, 1839, some of which were in the water-cavity of Salpas; also between New Zealand 

 and New Holland.)) (Dana.) 



