350 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Pseudocaligus, no v. gen. 



Animal similar to Caligus. The general structure of 

 the various appendages, with the exception of the fourth 

 pair of feet, is the same as in that genus. Fourth pair 

 of feet very rudimentary, almost obsolete, consisting of a 

 basal portion only ; no exopodite, as in Caligus. 



21. — Pseudocaligus hevipedes (Basset Smith). PI. II., 

 figs. 1-6. 

 Caligus brevipedes, B. Smith, Ann. and Mag. Nat. Hist. (6), 

 vol. xviii., p. 11, pi. iii., fig. 1 (1896). 



A number of specimens of this species were found inside 

 the operculum of a three-bearded Rockling (Onus tricir- 

 ratus), caught in Barrow Channel, August, 1900. Also 

 on another one sent me by Mr. Ohadwick, Port Erin, 

 March, 1901. 



Length of female, 3'6 mm. ; male, 2*8 mm. 



22. — Lepeophtheirus pjollachii, Basset Smith. 



Lepeoptheirus pollachii, B. Smith, Ann. and Mag. Nat. Hist. (6), 

 vol. xviii., p. 12, pi. iv., fig. 1 (1896). 



Attached to the inside of the mouth of Pollack (Gadus 

 pollachius), caught on the offshore stations between 

 Lancashire and Isle-of-Man, March, 1900, March and 

 April, 1901. 



23. — Cycnus pallidas (Van Beneden). 



Congericola pallidas, Van Ben., Bull. Acad. Roy. Belg., vol. xxi. 

 pi. 11 (1854). 



On the gills of the Conger (Conger vulgaris), caught in 

 the Barrow Channel, March, 1900 ; also on Congers from 

 the offshore stations, caught at various times during the 

 past two years. A number of specimens were found on 

 each fish examined. It is a small, slender species, and 

 easily overlooked. 



