334 M. A. Boeck on the Ampkipoda 



ther. The first joint of the secondary flagellum is very long, 

 furnished on the lower margin with several spines ; the buccal 

 organs are of the usual form. Masticatory tubercle of the 

 mandibles small. Palpus of first pair of maxilla? rather long. 

 The outer lamella of the maxillipedes reaches to the third joint 

 of the palpus, and is furnished on the margin with scattered, 

 coarse teeth. Fifth joint of the first pair of feet shorter than 

 the fourth, and obliquely cut off at the end. Claws short, but 

 strong. The fourth joint of the second pair of legs is elon- 

 gated, twice as long as the following one. The first joint of 

 the last three pairs of legs is rather long. The branches of 

 the fifth pair of abdominal feet are very unequal, the inner one 

 being much shorter than the outer, and furnished at the apex 

 with a long, conical, and pointed claw. The branches of the 

 last pair are lanceolate, the inner one much shorter than the 

 outer. The inferior posterior angle of the second abdominal 

 segment forms a short point ; the third runs out into a recurved 

 hook. 



4. A. BruzeUi, mihi. — The flagellum of the superior antennaj 

 is formed of twelve joints, of which the first is rather short ; 

 the secondary flagellum consists of from five to six joints. The 

 first two joints of the inferior antennae are short, but broad ; 

 the third joint is longer, the fourth much longer and thicker 

 than the preceding one ; the fifth shorter than the fourtli, but 

 longer than the third. The apex of the mandibles is acumi- 

 nate, their masticatory tubercles large and prominent. The 

 rows of spines are formed by eight blunt teeth. Palpi long and 

 narrow. The outer lamella of the first pair of maxillai is elon- 

 gate triangular, and its inner side is beset with numerous broad, 

 serrated spines. The inner lamella bears two broad, ciliated 

 hairs. The palpi are toothed at the apex. The outer lamella 

 of the maxillipedes is large, with a few obtuse tubercles on 

 the margins ; the inner lamella bears a strong tooth and many 

 ciliated hairs. The first pair of feet are very long and narrow ; 

 the second joint is somewhat more than half as long as the 

 first ; the fourth is shorter than the fifth, which is about the 

 length of the second joint, and obliquely cut off at the end. 

 The claws are small. The first joint of the second pair of feet 

 is extremely long; the fifth is narrow, and not half so long as 

 the preceding one. The branches of the last pair of abdominal 

 feet are lanceolate. The telson is elongated and divided nearly 

 to its base. The inferior posterior angle of the second seg- 

 ment of the abdomen forms a little point, and that of the third 

 a recurved hook. 



Ickjiojjus, Costa. — A. Costa separates this genus from L?/- 

 sianassa, M.-Edw., by the great length of the antcnnre and of 



