OF FISH OBTAINED AT PLYMOUTH. 159 



Cecrops Latreillei, Leach. Two specimens were found in the gills of 

 sunfish, Orthagoriscus mola. 



Pandarus, Leach. 



(1) Front edge of cephalothorax, not deeply lobed ; (2) anterior 

 antenna free ; (3) cephalothorax broader behind than in front ; (4) 

 first pair of maxillepeds cheliform ; (5) the outer branch of first true 

 leg single-jointed, the inner with two joints, both branches of second 

 and third pairs two jointed, branches of fourth pair one jointed. 



Fandarus hicolor, Leach. A number of specimens of this species 

 were taken from the surface of Scyllium catidus. 



DICHELESTHINA. 



Leknanthropus, Nordmann. 



(1) Abdomen without dorsal plates ; (2) the two posterior pair of 

 limbs changed into lamellar appendages ; the two first pair very 

 small. 



Lernanthropus Kroyeri, Van Beneden. From only one Lahrax lupus, 

 in over a dozen examined, did I find any of these curious animals. 

 This was a full-grown fish, and twelve were found, some on the gills of 

 either side. Many of them had the abdomen as a tense bag of bloody 

 fluid, and most had spermatophores attached. 



Clavella, Oken. 



(1) Anterior antennfc single, six-jointed, projecting under the edge of 

 the cephalothorax ; (2) posterior antennte with single hook-like claw ; 

 (3) only the anterior pair of limbs formed ; (4) genital segment of 

 female, five to six times as long as the anterior part of the body. 



Clavella mulli, Van Beneden. A number of specimens of this minute 

 species were taken from the gills of the red mullet, all females. The 

 long straw-coloured ovarian tubes are easily seen projecting beyond the 

 gills. 



Cycnus, Bd wards (Congericola, Vom Beneden). 



All four pairs of limbs formed, and two branched anterior antenna^, 

 six-jointed. 



Cycnus {Congericola) pallida, Van Beneden. This species was not 

 common. From 14 well-grown conger, I only obtained specimens in 

 two : eleven altogether. They are, however, very difficult to find. The 

 posterior antennae are very strong and large, compared with the last 

 genus. 



