[fraser] COPEPODS PARASITIC ON FISH 65 



The first antenna is two-jointed, the terminal joint the longer, 

 with four terminal setae and one less than half way along. Second 

 antenna and maxillipeds similar to those of the female. Mandible re- 

 latively shorter with coarser teeth. Maxilla with teeth lacking. 

 The swimming legs are rudimentary, the second pair being somewhat 

 more defined than the first. 



Total length 0-9 mm., length of céphalothorax 0-63, width 0-39. 



Colour: White. 



{rectangiilaris from general body shape of the female.) 



Found on the gills of the flounder, Platichthys stellatus. 



Family LERN^EOPODID^ 



Charopinus dentatus (Wilson) 



Brachiella dentata. Wilson, Contr. to Can. Biol., 1912, p. 97. 

 Charopinus dentatus. Wilson, Proc. U.S. Nat. Mus., vol. 47, 1915, 



p. 654. 



Found only on the host originally reported, Raja hinociilata. 



Clavella parva, (Wilson) 



Clavella parva. Wilson, Contr. to Can. Biol., 1912, p. 95. 



Wilson, Proc. U.S. Nat. Mus., vol. 47, 1915, p. 676. 



Found on Tœniotoca lateralis and Axyrias harringtoni as well as 

 on the original host, Sebastodes auriculatus. 



Clavella uncinata (Millier) 



Lernœa uncinata. Mûller, Zoological Danicae, vol. I, 1776, p. 3^. 

 Clavella uncinata Wilson, Contr. to Can. Biol., 1912, p. 97. 



Wilson, U.S. Nat. Mus., vol. 47, 1915, p. 688. 



Found only on the original host, Gadus macrocephalus. 



Clavellopsis robusta (Wilson) 



Clavella robusta Wilson, Contr. to Can. Biol., 1912, p. 96. 

 Clavellopsis robusta. Wilson, Proc. U.S. Nat. Mus., vol. 47, 1915, p. 



Found on Sebastodes auriculatus (original host), S. pinniger and 

 5. melanops. Those found on the gills of 5. melanops had much 

 larger posterior processes than those found on S. pinniger and S. 

 auriculatus. 



