120 BRITISH PARASITIC COPEPODA. 



rudimentary ; in the first pair both rami two- jointed, 

 the outer ramus of the second pair also consisting of 

 two joints but the inner one three- join ted. Caudal 

 rami very small and inconspicuous. Length about 

 1 mm. Colour similar to that of the gills of the fish. 

 Egg-strings tolerably short and containing compara* 

 tively few but moderately large ova. 



No males have been observed. 



Habitat. Found adhering to the gills of Crenilabrui 

 nielops (Linn.), the connor or goldsinny, captured in 

 Luce Bay, Solway Firth (A. Scott). 



This species, which was described in 1907, was at first 

 doubtfully assigned to Clavella (or Hatschekia) labracis van 

 Beneden; the examination, however, of additional specimens, 

 obtained subsequently, showed that certain differences which 

 had been recognized in the first specimens were fairly constant, 

 and were moreover sufficiently important to make it necessary 

 to regard it as distinct from others that have been described. 



In its general appearance this species has a resemblance to 

 the Hatschekia labracis of van Beneden. It differs from that 

 species in the head being rounded at the sides not angular 

 as in that species in the armature of the antennules, and in 

 the terminal claws of the antennas being much less strongly 

 hooked, as well as in one or two other anatomical details. At 

 the base of each antenna there is a small knob-like process 

 similar to that on the antenna of Hatxclu'kin labracis. This 

 fish is not the same as Jago's goldsinny, but belongs to a 

 different species of the Wrasse family. 



Genus 23. KROYERIA P. ./. van Beneden, 1853. 



Syn. Loncliidium Gerstaecker, 1854. 



Cephalic segment moderately broad and plate-like, 

 and furnished at the posterior end with movable styli- 

 form processes, projecting backwards. Three distinct, 

 free thoracic segments, without lobes or dorsal plates. 

 Genital segment long and narrowly cylindrical. Ab- 

 domen short, unsegmented in the female, and termi- 

 nating in two lanceolate setose furca. Antennules 

 composed of seven distinct joints. Antennae very 

 stout and cheliform. Mandibles and maxillae rudimen- 



