188 BRITISH PARASITIC COPEPODA. 



some of the teeth being alternately larger and smaller. 

 Maxillae moderately stout, furnished with two mode- 

 rately long, narrow, and spiniferous apical processes, 

 two small spinules also springing from a subapical 

 rudimentary lobe. The first maxillipeds very short, 

 stout, and strongly uncinate. The second maxillipeds 

 very short, with the distal end expanded and united 

 at the top. Length from the forehead to the end of 

 the longer posterior appendages about 6 - 5 mm. 



Male. — We have not ourselves seen the male of 

 Thysanote impudica ; Nordmann gives a figure of it 

 and describes it as very minute (about 0*6 mm.). It 

 somewhat resembles the male of Brachiella, and its 

 appendages also appear to be somewhat similar to 

 those of that genus. 



Habitat. — Parasitic on the gills of Trigla sp. and 

 Gadus sp. On the gills of sapphirine gurnard (Trigla 

 hirundo) captured at Polperro and Starcross (A. M. 

 Norman). Plymouth (B as sett- Smith). Irish Sea (A. 

 Scott). Moray Firth (T. Scott). Dr. Bassett-Smith 

 records this species also from Trigla, cuculus and gur- 

 nardus ; and M. Nordm'ann from Gadus seglefinus (the 

 haddock). 



Genus 39. CHAROPINUS Eroyer, 1863. 



Syn. Lernsea Retzius (in part) ; Lemeopoda Nordmann (in part). 



Female. — Cephalothorax of moderate size, ovate or 

 sub-conical, indistinctly segmented, with obscure trans- 

 verse constrictions behind the cephalon ; neck short 

 or none. Genital segment pyriform or elongate- 

 ovate ; abdomen very small or obsolete. Posterior 

 appendages two, slender, short, one on each side 

 of the abdomen. Antennae short, stout, uncinate. 

 Mandibles and first maxillipeds nearly as in Thysanote. 

 Second maxillipeds greatly elongated, slender, or 

 moderately stout, contiguous or coalescent at the 

 apex. Apex enlarged or biramose, and clasping a 

 cross bar of chiton, or greatly attenuated and fixed at 



