CRUSTACEA. 137 



Fam. VerrucidsB. 

 Genus Verruca, Schuraaclier. 

 Verruca Strdmii, 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 COPEPODA. 



Suborder GNATHOSTOMATA. 



Genus Notodelphys, Allman. 



Notodelphys ascidicola, Allman. 



Common in Ascidia intestinalis and others. 



Suborder PARASITA. 



Genus CALIGUS, 0. F. Miiller. 



Caligus rapax, M. -Edwards. 



Common on cod. Many specimens have Udonella caligorum 



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



Genus Lepeophtheirus, Nordm. 

 Lepeopktheirus salmonis, Kroyer. 

 Abundant on the salmon. 



Genus Cecrops, Leach. 



Cecr&ps Latreillii, Leach. 



Common on the gills of the sunfish {Orthagoriscus mola). 



Genus Anchorella, Cuvier. 

 Anchorella unciuata, 0. F. Miiller. 

 Abundant on the gills of cod and haddock. 



