CRUSTACEA. 



137 



Fam. VerrucidsB. 

 Genus Verruca, Schumacher. 

 Verruca Stromn, O. F. Miiller; Darw. Mon. p. 518, pi. 21. f. 1. 

 Abundant on rocks and stones between tide-marks in the 

 laminarian region, and on crabs in the coralline. 



Order Coi'EPODA. 



Suborder GNATHOSTOIIATA. 



Genus NOTODELPHYS, Allman. 



Notodelphys ascidicola, Allman. 



Common in Ascidia intestinalis and others. 



Suborder PARASITA. 



Genus Caligus, 0. F. Muller. 

 Caligus rapax, M. -Edwards. 

 Common on cod. Many specimens have Udonella caUgorum 

 attached to them. Free specimens often occur in rock-pools. 



Genus Lepeophtheirus, Nordm. 

 Lepeophtheirus salmonis, Kroyer. 

 Abundant on the salmon. 



Genus Cecrops, Leach. 



Cecrops LatreiUn, Leach. 



Common on the gills of the suntish {Orthagoriscus niola). 



Genus Anchokella, Cuvier. 

 Anchorella uncinata, 0. F. Muller. 

 Abundant on the gills of cod and haddock. 



