344 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



4. — *Octobothrium scombri (Kuhn). 



Octostoma scombri, Kuhn, Mem. Mus. d'hist. nat., vol. xviii. 

 (1830). 



Attached to the gills of Mackerel caught off the Manx 

 coast, August, 1900. This is a very slender species and 

 unless the gills are carefully examined will be easily over- 

 looked. 



5 : — *Onchocotyle appendiculata (Kuhn). 



Polystoma ajipendiculatum, Kuhn, Mem. Mus. d'hist. nat. 

 vol. xviii., p. 362 (1830). 



Attached to the gills of Grey Skate (Raia batis), caught 

 on the offshore stations between Lancashire and Isle-of- 

 Man, February, 1900. It is easily identified by having, 

 in addition to the six suckers at the posterior end, a 

 slender median appendage arising from between the 

 suckers and passing in an anterior direction. 



6. — *Phyllonella solece, Van Beneden and Hesse. 



Phyllonella solece, Van Beneden and Hesse, Recherches sur les 

 Trematodes, p. 70, pi. v., figs. 1-8 (1863). 



Attached to the scales on the " white side " of the 

 Common Sole (Solea vulgaris), caught on the offshore 

 stations between Lancashire and Isle-of-Man, April 19th 

 1901. 



7. — ? Placunella pint, Tan Beneden and Hesse. 



Placunella pini, Van Beneden and Hesse, Recherches sur les 

 Trematodes, p. 72, pi. v., figs. 9-18 (1863). 



Attached to the gills of Yellow Gurnard (Trigla 

 hirundo), caught on the offshore stations between 

 Lancashire and Isle-of-Man, April 19th, 1901. 



This species differs in some respects from the figure of 

 Placunella pini given by Van Beneden and Hesse, as will 

 be seen from the appended drawing, and may turn out to 

 be a different species. There are eight distinct and two 



