240 Messrs. T. and A. Scott on some 



triangular apex. Body narrow, tapering slightly and evenly 

 to the caudal extremity (fig. 4). Anterior antennte (female) 

 six-jointed, stout, each of the third, fifth, and sixth joints 

 armed with a strong setiferous spine on the upper aspect; the 

 upper distal angle of the third joint is produced and forms the 

 base of a stout olfactory appendage; the formula shows the 

 proportional length of the joints — 



9 . 10 . 8 . 3 . 4 . 10 



Female anterior antennae . 



3 4 5 6' 



Posterior antennffi somewhat similar to those of Chtodes linearis^ 

 Claus, but rather shorter and stouter. Mouth-appendages also 

 somewhat similar to those of that species. Inner branches of the 

 first thoracic feet obsolete and replaced by a dagger-shaped 

 setiferous spine ; the second joint of the outer branches is 

 furnished with a small plumose seta on the inner edge and a 

 stout conical spine springs from the outer distal margin of 

 the first and second joints, while the third joint is provided 

 with five spiniform setee round its extremity and outer edge 

 (fig. 9). The inner branches of the next three pairs are 

 nearly alike, except that those of the second and third pairs 

 are rather longer than the first two joints of the outer branches, 

 while those of the fourth pair scarcely reach to the end of the 

 second joint ; the inner branches of the third pair in the male 

 are slightly shorter than in the female, and armed with a 

 terminal conical spine, as shown in the figure (fig. 13). 

 Caudal stylets broad, subovate, nearly straight on the outer 

 edge and convex on the inner, and provided with a few small 

 lateral and terminal setaj. 



Uah. Among Filograna implexa^ brought up in the trawl- 

 net in the Moray Firth. 



Remarks. In form and in many of its details this curious 

 species is closely allied to Cletodes, but the remarkable struc- 

 ture of the first thoracic feet is so much at variance with the 

 characters of that genus as to render its position in Cletodes 

 untenable. 



PSEUDANTHESSIUS, ClaUS. 



This genus of the Lichomolgidse is distinguished from its 

 allies by the structure of the mouth-appendages, and espe- 

 cially of the fourth pair of thoracic feet, the inner branches of 

 which are one-jointed (fig. 20). Two British species of 

 Pseudanthessius have already been described, viz. Pseudan- 

 ihessius liber (B. & R.) and Pseiidafithessius Thorellii 

 (B. & R.)*. We have now to record a third species, which 

 * Mon, Brit. Copep. vol. iii. pp. 44 and 47. 



