/ 



94 BRITISH PARASITIC COPEPODA. 



came ; this is therefore a remarkable instance of wide 

 distribution " {A. M. Norman). 



We are greatly indebted to Canon Norman for the privilege 

 of examining the specimens referred to, and for permitting us 

 to reproduce the figure of it published in ' Crustacea of Devon 

 and Cornwall/ 



(71enus 15. PANDARUS Leach, 1816. 



Femal'e. — Body moderately broad and elongate. 

 Carapace ovate, wider behind than in front ; frontal 

 plates of moderate size ; posterior margin not very 

 deeply excavated. Thorax provided with three pairs 

 of dorsal plates, the first pair lateral and of an 

 elongate-ovate form, the second pair between them in 

 the form of broadly-rounded lobes separated from 

 each other by a moderately deep median sinus; the 

 third pair nearly as wide as the carapace and prolonged 

 backwards so as to cover a considerable portion of the 

 genital segment ; the dorsal plates of the genital 

 segment with the inner lateral margins contiguous and 

 apparently coalescent, and produced posteriorly into 

 rounded or angular lobes having between them a 

 flattened suborbicular median plate concealing the 

 abdomen. 



Antennules biarticulate and provided with an 

 adhesive disk at the base. Antennas armed with 

 terminal claw-like hooks, and also furnished with 

 adhesive disks or pads somewhat similar to those at 

 the base of the antennules and maxillipeds. Thoracic 

 legs biramose ; rami of the first three pairs biarticu- 

 late, the outer ramus of the first pair more or less 

 abnormal in form and the joints sometimes coalescent ; 

 in the fourth pair the rami consisting of a single joint. 

 Caudal rami subtriangular and divaricate, usually seen 

 projecting — one on each side — beyond the plate at the 

 end of the genital segment. 



Male. — The male has a close general resemblance to 

 the male of Lejyeophtheirus, the antennules, which are 

 provided with adhesive disks as in the female, differ in 



