116 



widening slightly in front. Caudal ranii exceeding in length the last 2 segments 

 combined and conspicuously lamellar, inner edge finely ciliated, outer edge exhi- 

 biting, somewhat beyond the middle, a distinct ledge to which the outermost seta, 

 together with the dorsal bristle, is attached ; apical setse comparatively short, but 

 rather coarse and densely plumose. Anterior antennae somewhat exceeding half 

 the length of the cephalic segment, and composed of 12 joints, the 2nd of which 

 is rather large, being fully as long as the 4 succeeding joints combined ; terminal 

 joint elongated, club-shaped. Posterior antennse comparatively short, but rather 

 stout, with the 2 middle joints confluent; terminal joint not much prolonged, and 

 carrying 4 elongated and finely ciliated setse, 3 apical and one lateral. Oral 

 cone extending only slightly beyond the insertion of the posterior maxillipeds, 

 and evenly tapered distally. Mandibles apparently biarticulate, and very finely 

 denticulate at the tip. Maxillse with the outer lobe scarcely more than half as 

 long as the inner, and carrying on the tip 2 moderately long setse. Anterior 

 maxillipeds with the distal part of the dactylus, as also the secondary spine, 

 finely denticulate inside. Posterior maxillipeds with the hand imperfectly defined 

 from the basal part; terminal part of the dactylus denticulate. Natatory legs 

 moderately strong, with the spines of the outer ramus dagger- like. Last pair 

 of legs with the distal joint well developed, sub-spatulate in form, and provided 

 with 3 setse, 2 issuing from the transversely truncated end, the 3rd from the 

 lower face at some distance from the apex; outer edge of the joint minutely 

 ciliated, inner projecting near the end to a dentiform process. 



Male, as usual, smaller than female, and having the anterior division 

 of the body less angular in shape. Anterior antennse more strongly built, and 

 composed of 14 joints, those of the distal part conspicuously thickened, 10th 

 joint armed in front with 2 slender spines, apical joint small, rounded. Posterior 

 antennse with the 2 middle joints well defined; the posterior maxillipeds also 

 quite normally developed. 



Colour (in female) yellowish grey, with scattered pigmentary patches of 

 an ochraceous hue on the dorsal face of the anterior division of the body. 



Length of adult female 1 35 mm., of male 1.10 mm. 



Remarks. This is the only as yet known species of the genus, and may 

 easily be recognized by the peculiar angular shape of the anterior division of 

 the body, which, especially in the female, is very conspicuous and indeed has 

 given rise to the specific name proposed by Scott. 



Occurrence. I have long been acquainted with this peculiar form, of 

 which some few specimens were collected, many years ago, at Eggesb0nses, west 



