occurring on the Norwegian Coasts. 411 



the projecting head. Their peduncle is very long, longer than 

 the flagellum, and without a secondary flagellum. The man- 

 dibles are large, divided and toothed at the apex, and with 

 long three-jointed palpi. The palpi of the first pair of maxillae 

 are two-jointed ; the inner lamella is small and thick. The 

 maxillipedes are long and slender ; the fourth joint of their 

 palpi is divided into two joints, the last of which forms a 

 pointed claw. The fifth joint of the last two pairs of feet 

 forms a prehensile hand, which in the second pair is much 

 larger than in the first, and of unequal size in the two sexes. 

 The three posterior abdominal feet are biramose, their branches 

 conical and without spines. Telson small and thin. Here 

 belongs the single species 



P. sophia, mihi. — The thorax is smooth, without keels or 

 points. The head projects in a small pointed horn between 

 the superior antennae. The eyes are large, nearly oval, with 

 very large facets. The superior antennae are as long as the 

 head and thorax ; their peduncles are much longer than the 

 flagella, which consist of twelve long but thin joints. The 

 second joint of the peduncle is the longest, the third longer 

 than the first. The inferior antennae are shorter than the 

 superior, but their peduncle reaches as far as that of the latter ; 

 the first joint has a large olfactory spine ; the fifth joint is 

 longer than the fourth. The fourth joint of the first pair of 

 legs is longer than the hand, which is oval, and the posterior 

 surface of the finger is serrated. The second pair of hands are 

 much larger than the first; the second, third, and fourth joints 

 are short, the last is produced behind and downwards into a 

 short process. The hands in the males are exceedingly large, 

 as long as the first joint, and oval ; their posterior edge is fur- 

 nished with two large blunt teeth. The claws are curved and 

 serrated at the apex. In the females the hands are much 

 smaller and nearly triangular. The first joint of the hindmost 

 three pairs of thoracic legs is elongated, nearly quadrangular, 

 the lower posterior angle projecting. The three hindmost 

 abdominal legs extend to nearly an equal distance backward, 

 and their branches are of equal length. The length was 

 about 5 millims. It was found at Farsund, at a depth of 

 15 fathoms. 



LejJtochcirus, Zaddach. — Zaddach established this genus in 

 the year 1844, for the species L. pilosus. Species which I 

 think ought to be referred to this genus have since been de- 

 scribed under various names : A. Costa's Microdeutojnis gryl- 

 lotalpa, Spence Bate's Lonchomeres gracilis, and Bruzelius's 

 species of Autonoe certainly belong to it. Lilljeborg separated 

 a number of species from the genus Gammarus under the 



