484 



Genital opening just behind pharynx. Excretory vessel branching 

 behind ventral sucker but the two lateral branches uniting above 

 pharynx. Puts one in mind of Halipegus ovocaudatus from the 

 mouth of frogs. Varies considerably in size in different fish — the 

 most noticeable variety occurring in the Salmon as very small 

 specimens with a short broad posterior half. 



16) Derogenes plenus. 



Intes, Anarrhichas lupus L. (Wolf-fish). 



New species :p/eww5, full, fleshy. 3,38X1,23. Broadest across ven- 

 tral sucker. Shorter and blunter posterior part. Mouth-sucker 0,392, 

 ventral sucker 0,792, its centre 1,848 from the anterior end. The 

 five genital masses bunched together in the extreme posterior end, 

 the rest of the body being distended with eggs. 



1 7) Hemiurus appendiculatus Rud. 

 Oesophagus, stomach. 

 Salmo salar L. (Salmon). 

 Osmerus mordax Mit. (Smelt). 

 Clupea harengus L. (Herring). 

 Gadus callarias L. (Cod). 

 Pollachius virens L. (Pollack). 

 Ammodytes tohianus L. (Sand Lance). 

 Anguilla anguilla L. (Eel). 

 Acanthocottus scorpius L. (Sculpin). 

 Hippoglossus hippoglossus L. (Halibut). 



Platysomatichthys hippoglossoides Walb. (Greenland Turbot). 

 Also widely distributed. 3X0,5. Body 2X0,5. Suckers of equal size. 



18) Lecithaster hothryophorus Olsson. 



(= Apohlema mollissimum Lev.) 

 Int. Salmo salar L. (Salmon). 



Clupea harengus L. (Herring). 1,5X0,5. 



19) Leptosoma ohscurum. 



Int. Lophius piscatorius L. (Goose-fish). 



New genus and species: XeTtrog, slender; acofÀa, body; obscurus, 

 unknown. 1,69X0,385. Mouth-sucker 0,154. Ventral sucker 0,261, 

 its centre 0,539 from the anterior end. Resembles outstretched ex- 

 amples of Lecithaster but is of a more uniform diameter and the egg 

 has more tham twice the dimensions. 



20) Sinistroporus simplex Rud. 



Int. Acanthocottus scorpius L. (Sculpin). 

 Salmo salar L. (Salmon). 



