of the Fishery Board for Scotland. 257 



strong desire was felt to include it in that genus ; but it was clearly per- 

 ceived that in order to do so a considerable modification of the definition of 

 that genus would be necessary. In Westwoodia the secondary branch of 

 the posterior antennae is two-jointed, and the first pair of swimming-feet 

 have the inner branches three and the outer only one-jointed. 



Pseudowestwoodia andrewi* sp. n. (PI. IX. figs. 21-29.) 



Description. — Female, '46 mm. (-^th of an inch). Body similar to 

 Westwoodia nobilis (Baird) in general appearance, but smaller. Anterior 

 antennae six-jointed, slender, and sparingly setiferous The first three and 

 last joints are elongate, while the fifth is smaller than any of the others. 

 The proportional lengths of the joints are as follows : — 



9 ■ 11 ' .11 ■ 6 • 4 ' 12 ■ 

 1-2-3-4-5-6* 



The posterior antennae consist of two sub-equal joints. The small one-jointed 

 secondary branch springs from near the middle of the first joint (fig. 23). 

 Mandible-palp with a moderately large basal joint bearing two small one- 

 jointed apical branches, each branch furnished with several slender setae 

 (fig. 24). Posterior foot-jaws moderately stout. Terminal claw slender, 

 rather longer than the joint from which it springs. The first joint bears a 

 small seta near its inner distal angle, and a similar seta springs from about 

 the middle of the inner margin of the second joint (fig. 25). The outer 

 branches of the first pair of swimming-feet are about equal to half the 

 entire length of the inner branches, and composed of two sub-equal joints. 

 The first joint is armed with a stout spine at the outer distal angle, while 

 the second joint bears a similar spine near the middle of the outer 

 margin. One small seta near the lower part of the inner margin, and two 

 spiniform setae at the apex. The first joint of the inner branches is 

 moderately stout and elongate, and becomes narrower towards the distal 

 end. A long plumose seta springs from the inner margin at about one-third 

 of the length of the joint from the proximal end. The second is small and 

 narrow, and only equal to about one-fourth of the length of the first joint, 

 and furnished with two slender, moderately elongate and spiniform apical 

 setae. A stout spine springs from both the inner and outer distal angles of 

 the second basal joints (fig. 26). The second, third, and fourth pairs are 

 nearly as in Westwoodia nobilis (Baird). The fifth pair are small and 

 foliaceous. The length of the produced inner portion of the basal joint is 

 scarcely equal to the breadth of the proximal end. Distal end broadly 

 truncate, and furnished with four spiniform setae and a short moderately 

 stout spine — the spine being at the exterior angle. Secondary joints small, 

 extending little beyond the end of the produced inner portion of the basal 

 joints ; sub-quadrangular in form, and armed with three short but strong 

 dagger-shaped spines on the somewhat obliquely truncate end, and a 

 small spine and a spiniform seta on the distal part of the inner margin 

 (fig. 28). Caudal stylets very short. A short stout spine springs from the 

 outer distal angle of each stylet, and the inner of the two principal tail 

 setae is about one- third longer than the other. 



Habitat. — Off Burntisland. Frequent. Among material dredged in 

 three or four fathoms water. 



Remarks. — This small but interesting species is readily distinguished 

 from others, even without dissection, when examined under the micro- 

 scope, by the peculiar armature of the fifth pair of thoracic feet. It seems 

 to have affinities with Westwoodia on the one hand and with Harpacticus 

 on the other, and forms a connecting-link between them. 



* The species is so named in compliment to my son, Andrew Scott, to whose pains- 

 taking and ever-ready assistance and facile pencil I owe so much of my success 

 among the Copcpoda. 



