of the Fishery Board for Scotland. 145 



the other two, is provided with two setae on the inner margin, two spines 

 on the outer margin, and also with two long spines of unequal length and 

 a long seta at the apex • the inner branches have the outer edge of each 

 joint fringed with minute bristles, and a moderately long seta springs 

 from the distal angles of the first and second joints and from the lower 

 half of the third joint ; the third joint is also armed with a terminal 

 spine and two long terminal setae (pi. xi., fig. 6). 



The armature of third and fourth pairs is similar to that of the second, 

 except that there are two setae instead of one on the lower half of the 

 inner margin of the last joint of the inner branches (pi. x., fig. 19, and 

 pi. xi, fig. 7). 



The fifth pair resembles, to some extent, the same appendages in female 

 specimens of Canthocamptus palustris, but the inner portion of the 

 primary joints, which are broadly sub-triangular, have the apex more or 

 less distinctly truncated rather than rounded. The armature of the inner 

 portion of the primary joints consists of five apical setae, of which the 

 three inner ones and the outermost are only of moderate length, but the 

 other — the second from the outside — is greatly elongated. The secondary 

 joints are oblong, with the outer and inner margins nearly parallel, the 

 length being equal to about twice the width at the broadest part ; outer 

 margin nearly straight, inner slightly convex, apex obliquely truncate and 

 furnished with six setae ; the second from the inside is very long, while 

 the second from the outside is short ; the others are of varying lengths, as 

 shown in the drawing (pi. xi., fig. 8). Furcal joints very short (pi. xi., 

 fig. 9). 



Habitat — West of Dunbar, near low water, collected by hand-net 

 Ocober 16, 1894, as well as in a collection from Musselburgh collected 

 the same year ; rare. 



Remarks. — Though this species resembles Canthocamptus palustr is in 

 some respects, the difference in the proportional lengths of the joints of 

 the antennules and of the outer and inner branches of the first pair of 

 swimming feet, and also in the form of the fifth pair, and especially of the 

 secondary joints of that pair, is sufficient to distinguish it. 



Fam. Laophontid^e. 

 Genus Laophonte, Philippi (1840). 



Laophonte longiremis, sp. n. PI. xi., figs. 10-20. 



Description of the Female. — Body slender, and somewhat similar to 

 Laophonte thoracica in general appearance. The cephalothoracic segment 

 is equal in length to the next three taken together, gibbous on the under 

 side, the ventral margins boldly rounded, the depth being nearly equal to 

 the length of the segment ; the remaining segment short. Furcal joints 

 about equal in length to the last abdominal segment. Length of the 

 specimen represented by the drawing (fig. 10) -6mm. (about -^ of an 

 inch). 



Antennules long, slender, and composed of seven joints (fig. 11); first 

 and second joints subequal, considerably longer than the first, the next 

 three small, but the end joint is nearly as long as the combined lengths of 

 the three preceding joints, as shown in the formulae : — 



Proportional lengths of the joints, - 16 • 25 • 22 • 7 • 4 • 7 • 16 

 Number of the joints, - - - - 1 2 3 4 5 6 7 



A long, slender, sensory filament springs from the upper distal angle 

 of the fourth joint, as shown in the drawing. 



