56 Messrs. T. and A. Scott on sonic 



process twice as long ns broad and furnislicd with a long 

 slender terminal seta ; the secondary joints are small, sub- 

 ovate, with irregular margins, and carry five setje — one at 

 the apex, one on the inner margin, and three on the outer 

 margin; the apical seta is longer than the others (fig. 15). 

 Caudal stylets very short. 



IJahitat. Cromarty Firth ; near Dunbar, at the mouth of 

 the Firth of Forth ; Port Erin, Isle of j\Ian. 



L'eviarls. 'I his small species closely resembles Pseudo- 

 u-esiwoodia Andrewi in size and in general appearance, but 

 difiers distinctly from it in the structure of the anterior an- 

 tennae and of the first and fifth feet. It appears to have an 

 extensive distribution. 



Pseudowestwoodia major ^ sp. n. (PI. Vf. figs. 17-20.) 



Description of the Sjjecies. — Female. Length '6 millim. 

 (■5V of an inch). In general appearance closely resembling 

 tlie species just described, but larger (fig. 17). Anterior 

 antennas eight-jointed, the first two stout, the others more 

 slender ; the two end-joints are subequal and shorter than 

 any of the other six joints. The proportional lengths of all 

 the joints are shown by the formula — 



Proportional lenptlis of tlie joints. . 15 . 15 ■ 18 . 12 . 8 . 8 . 5 . 6 

 Jsumber of the joints 1 2 3 4 567 8 



The posterior antennae and mouth-organs are somewhat like 

 those of the last species, but the second joint of the posterior 

 foot-jaws bears a small seta near the middle of the inner 

 margin, aiid both the outer and inner margins are partially 

 fringed with minute hairs ; there are also two setae at the 

 base of the terminal claw^. The first pair of swimming-feet 

 have the first joint of the inner branches proportionally more 

 elongate than that otthe same pair in either of the other two 

 species of Pseudowestwoodia, the first joint of the inner 

 branches in this species being equal to fully twice the length 

 of the outer branches ; the end-joints, like those of the inner 

 branches of the first pair in the species just described, have a 

 pseudodivision across the middle, while the armature of both 

 the inner and outer branches is very strong (fig. 19). The 

 second, third, and fourth pairs are very similar to those in 

 the other two species. Fifth pair large, foliaceous ; basal 

 joint nearly as long as broad ; the inner portion, which 

 reaches to the extremity of the secondary joint, bears five 

 stout setiferous spines round the broadly and irregularly 

 curved apex ; tiie exterior angle is not produced, but is 



