8 



CARL BOVALLIUS, AMPHIPODA IIYPERIIDRA. 



The dactyli of the third and fourth itairs are very strong. 



The jifth jjaw' are the longest; the femur is denticulated along the posterior margin, 

 and armed with a strong, tooth-like spine at the lower anterior corner. The metacarpus 

 and the dactylus are filiform. 



The seveiith pair are very small and slender, scarcely adapted for locoraotion. 



The uropoda are very slender, the exteriör rami are obsolete. 



TYRO GRACILIS, DANA, 1850. 



Tiirri f/racilis. Dana. 

 Facaimile from Dana. U. S. Expl. Exj). Criist. II, pl. ^>5, fl»;. G. 



Diagli. Oeidi pai'vi, lenticulis novem. Anienncc primi paris corporis fere longitudine, subulataj. 

 Pedes pereii qiiinti paris corpore non breviores, femore longissimo, post minute spino.so, 

 apice spinose producto. Pedes septimi paris pedibiis rpiinti paris plus dimidio breviores. 

 Segmenta plei latere acuta, angiilo postico subtruDcato. Segmenta itri duo ultima libera, 

 non coalita. Pedes nri tenues, pedes primi et tertii pariuni pedibus secundi paris longiores. 

 Pedes tertii paris ramum externuni l)revom acutuni ferunt. 



The eijes are small, with nine ocelli. The first pair of antenna' are about as long as tlie 

 body. The fifth pair of pereiopoda are as long as the body; the femur is very long, 

 minutely spiuulous along tlie posterior margin, tlie apex produced into a spine-like process. 

 Tlie seventli pair are shorter than half the fifth. The lateral parts of the pleonal segments 

 are sharp, the posterior corners subtruneate. The last two n.ral segments are free, not 

 coahisced. The w-opoda are slender, those of the first and third pairs are longer than 

 those of the seeond pair. The third pair are jirovidcd with a short, sharp, exteriör ramus. 



Coloiir. Keddish in irregular spöts, the antennas are in part reddish. 



Leiigtli. 9 mm. 



Hab. The Atlantic: Lat. 1° N. Long. 18° W. (Dana). 



