226 BRITISH PARASITIC COPEPODA. 



The males, which are very small, measure only about 

 0*3 mm., and are provided with large uncinate maxil- 

 lipeds. Males, however, do not appear to be very 

 common. 



Habitat. Parasitic on the greater fork - beard 

 (Phycis blennoides (Briin.)). It is usually found adher- 

 ing to the gill-arches and not to the filaments of the 

 gills. 



One of the more obvious characters of this species seems to 

 be the small but quite distinct horn-like processes at the base 

 of the cephalothorax, which can be seen one on each side 

 extending outwards at about right angles to the cephalo- 

 thorax. 



12. Clavella lophii (M. Edwards). 

 (Plate LI, fig. 7.) 



1840. ? Brachiella lophii M. Edwards. (42) vol. iii, p. 514, pi. xli, fig. 4. 

 1877. ? Brachiella lophii Vogt. (142) vol. vi, p. 426. 



Female. A small and robust species. Cephalo- 

 thorax moderately short, subcylindrical or subconical, 

 stout but less robust in front. Genital segment some- 

 what dilated, widest posteriorly, postero-lateral corners 

 rounded. Abdomen very short. Egg-strings short, 

 saccate, rather longer than the genital segment, and 

 containing tolerably large ova. 



Mouth-appendages apparently somewhat similar to 

 those of G. rugosa. The second maxillipeds very short 

 and coalescent, and terminating in a small, horn- 

 coloured, chitinous button. % Colour of the specimen 

 yellowish. Length about three and a half millimetres. 



Male. Very small and of the usual Clavella 

 (Anchorella) type; short, and with the dorsum boldly 

 arched. 



Habitat. Found adhering to the gills of an angler- 

 fish (Lophius piscatorius) ; locality uncertain. 



We are indebted to Mr. "W. M. Tattersall, M.Sc., Keeper 

 of the Manchester Museum, for the privilege of describing 

 this species. The drawing is made from the mounted specimen. 



