220 BRITISH PARASITIC COPEFODA. 



6. Clavella brevicollis M. Edwards. 

 (Plate LXV, fig. 1 ; Plate LXVI, figs. 12-16.) 



1840. Anchorella brevicollis M. Edwards. (43) vol. iii, p. 518. 



1877. Anchorella brevicollis 0. Yogt. (142) p. 432. 



1901. AnchorMa brevicollis T. Scott. (113) p. 135, pi. viii, figs. 11-16. 



Female. — Resembling Clavella uncinata in some 

 respects but differing considerably in the following 

 particulars: cephalothorax comparatively much, shorter 

 and stouter, and appearing rather to be a prolonga- 

 tion of the posterior portion of the body forwards, 

 the only limitation being a slight constriction imme- 

 diately behind the second maxillipecls. Genital seg- 

 ment subglobular, rather longer than broad, and 

 without posterior appendages. Abdomen small, dis- 

 tinct. Antennules short, two-jointed, basal joint large, 

 end joint small and furnished with a few apical 

 setge. Antenna? simple, rudimentary, but stout and 

 apparently uniarticulate. Mandibles slender, their 

 armature consisting of a few comparatively large 

 teeth with intermediate smaller ones. Maxilla? mode- 

 rately stout, provided with two subapical processes 

 bearing short terminal spines, and two minute lateral 

 spines on the same side as the processes. The first 

 maxillipecls large, with strong terminal claws. The 

 second maxillipecls entirely coalescent, very short and 

 stout, and terminating in a chitinous knob. Length 

 about 4*5 mm. 



Male not observed. 



Habitat. — Parasitic near the base of the anal fin of 

 a haddock captured in the Firth of Forth in January 

 1896. P. J. van Beneden records this species as 

 parasitic on the body (not on the gills) of haddocks ; 

 so also does M. Edwards. 



7. Clavella stellata (Kroyer). 

 (Plate LXV, figs. 8, 9.) 



1837-1838. Anchorella stellata Kroyer. (70) pi. i, vol. ii, p. 142, pi. iii, 

 fig. 5. 



1877. Anchorella stellata C. Vogt. (142) vol. xiv, p. 432. 



