336 M. A. Boeck on the Amphipoda 



the Sooloo Sea. I have found a species upon our coast 

 which must be referred to it, although it does not completely 

 agree with the character of the genus as given by Dana. It 

 differs in the following particulars from Dana's description 

 and figure. The superior antennas are longer than the inferior, 

 which is probably due to the fact that my specimen was a 

 female, and Dana's males. The palpi of the first pair of 

 maxilla? are two-jointed, with the joints of equal length ; but 

 Dana figures them as of one joint. This probably depends on 

 imperfect observation. In my species, moreover, the maxilli- 

 pedes are thicker, and both their lamellae larger, and the apices 

 of the maxilke are not furnished with secondary teeth ; but in 

 external form and in the other organs it agrees with the spe- 

 cies established by Dana. The characters of the genus may 

 perhaps be settled as follows : — 



Body elevated. Epimera moderately long, narrow, and 

 ciliated at the end. Peduncle of the superior antennas elongated, 

 but its first joint short. The nagellum is small, and the se- 

 condary flagellum somewhat less than this. Mandibular palpi 

 three-jointed. First pair of maxillae strong, their palpi two- 

 jointed, with the joints of equal length ; the inner lamella elon- 

 gated, with a few ciliated setae at the apex. The maxillipedes 

 are either long or of moderate size. The first two pairs of legs 

 furnished with prehensile hands ; the last pair of abdominal 

 feet are broad, and their terminal branches beset with ciliated 

 hairs. Telson bifid. The ovigerous lamellae are long and 

 narrow, and furnished with a few but long hairs. 



From these characters we see that the genus must, as Dana 

 supposed, stand in the neighbourhood of Anonyx and Lysia- 

 nassa, and therefore belong to his subfamily Lysianassidae, 

 and not to the Gammaridae, as Spence Bate and others have 

 thought, on the ground that the peduncle of the superior an- 

 tennae is long and the branches of the last pair of abdominal 

 feet broad and ciliated ; for even in Anonyx tumidus the pe- 

 duncle is elongated, and several species of Anonyx (such as 

 A. serratus, mihi) have the branches of the last pair of abdo- 

 minal feet furnished with a few ciliated hairs on the inner side. 

 The form of the ovigerous lamellae and of the inner lamella of 

 the first pair of maxillae, however, is sufficiently characteristic 

 to distinguish it from these. 



U. norveyica, mihi, resembles U. irrostratus, Dana, in the 

 form of the head, but differs from that species in that the in- 

 ferior posterior angle of the fourth joint of the first two pairs 

 of feet is acute, and the branches of the last pair of abdominal 

 feet are short. The first two pairs of hands are not narrow, 

 as in U. eleyans, Spence Bate, but short • and the inner branch 



