408 M. A. Boeck on the Amphipoda 



extremely long ; the inner lamella of the first pair of maxilla? 

 is small, and furnished with one bristle. Here belong the 

 species panopla and pulchella, which may be raised into a dis- 

 tinct genus, and this may retain Bruzelius's generic name 

 Param/phithoe. Others have an elongated compressed body 

 with moderate epimera and long antennas ; the inner lamella 

 of the first pair of maxilla? is furnished with from four to five 

 long, thick, ciliated bristles ; the inner lamella of the second 

 pair of maxilla? has at the apex many simple bristles, but on 

 the inside there are several very strong and ciliated ones ; the 

 maxillipedes are large, and their palpi of moderate length ; 

 the hands of the first two pairs of legs are nearly of the same 

 size, but small ; the fifth joint in the third and fourth pairs of 

 legs is very long, longer than the third joint ; the telson is 

 single ; the branches of the last pair of abdominal feet long, 

 often unequal ; the ovigerous lamella? are much larger than 

 the respiratory plates, and have their edges closely beset with 

 hairs. Here belong the species Mcuspis, elegans, Icevtuscula, 

 and tridentata, besides two new ones 5 I have placed all these 

 in the genus Amphithopsis. The new species are : — 



A. glaber, mihi. — The eyes are oval; the peduncle of the 

 superior antenna? much thicker than the flagellum, which 

 consists of twenty-two joints ; the peduncle of the inferior an- 

 tenna? is short, and the fourth joint only a little longer than 

 the third ; the first two pairs of legs are of the same size and 

 form ; the fifth joint or hand is longer than the fourth, and its 

 inferior edge is obliquely truncated and furnished with a 

 strong spine at the place where the point of the finger meets 

 it ; the two following pairs of legs have the fifth joint very 

 long, nearly as long as the preceding two together ; the telson 

 is oval ; the thorax smooth and without spines. 



A. longicaudata, mihi. — In this the maxillary palpi are very 

 long, their third joint very broad at the end, and transversely 

 truncated ; the second pair of hands is longer than the first ; 

 the fifth joint very long, slender, and nearly of the same length 

 as the preceding ; its inferior side is straightly truncated, and 

 the finger very small ; the telson is small and oval; the posterior 

 three pairs of abdominal feet are extremely long, their outer 

 branch shorter than the inner, especially in the sixth pair of 

 legs, in which the outer branch is not of half the length or 

 thickness of the inner one ; the inferior posterior angle of the 

 third abdominal segment is nearly straight. Of both these 

 species single specimens were found at Farsund. As they 

 were partially injured, the descriptions are somewhat im- 

 perfect. 

 ■AcanthonotuSj Owen. — Owen established this genus for the 



