344 ON SOME NEW GENERA AND SPECIES OF AMPHIPODA, 



tubercle is prominent and fringed with numerous cilia. The 

 inner lamella of the first pair of maxilla3 is short and narrow, 

 ciliated internally and armed distally with but three slender 

 ciliated spines which nearly equal the whole lamella in length : 

 the middle lamella is longer than the inner, its distal border is 

 straight and armed with about a dozen stoutish spines, which are 

 bifurcate near the extremity — one branch being very short, while 

 the other is longer and slightly incurved ; the inner border is 

 ciliated ; the external lamella is the most prominent, its distal 

 extremity is rounded, and is armed with short, stout, simple spines 

 with a few of more slender form extending also down about half 

 of the outer and less than one-third of the inner border — those 

 on the latter aspect being rather stouter than the rest. The 

 second pair of maxillae have both lamellae expanded, ovate in 

 outline, the inner rather shorter than the outer, armed at its 

 extremity and in about half of its inner surface with a series of 

 stoutish spines slightly curved at the tips ; the outer lamella is 

 armed at the distal extremity and in less than half of its inner 

 surface with two sets of spines — those of the one set similar in 

 size and form to those of the outer lamella, the others longer and 

 more slender. The basal j oint of the maxillipedes has its squamous 

 process oblong, with a straight, distal edge, and a rounded 

 external angle, and is armed at its distal extremity, and on the 

 distal and internal portion of its deep surface with small, curved, 

 ciliated spines. The squamous process of the ischium is much 

 longer than that of the basos, is long-ovate in general outline, but 

 has its inner border slightly concave about the middle of its extent, 

 while the outer border is strongly convex, the inner border is 

 armed with a uniserial row of slender non-ciliated hairs, which 

 are about equal in length to the breadth of the plate. The two 

 succeeding segments are very stout ; the meros is about half the 

 length of the carpus, and is armed with only two or three hairs, 

 while the latter is of irregular ovate form, more pointed at its 

 proximal than at its distal end, and fringed internally with a 



