192 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Every opportunity of examining fish for parasites of 

 all kinds is taken full advantage of. Mr. Johnstone is 

 working out the Protozoa and internal worms, the leeches, 

 trematodes and Crustacea being left to me. A number 

 of trematodes have already been recorded in a former 

 paper, but the group is by no means worked out. 



(3) Epibdella sp.— Plate YIIL, fig. 1. 



Several specimens of a form closely resembling 

 Epibdella hippoglossi (Muller) were found on the skin of 

 the common dog-fish (Scyllium canicula). The fish were 

 caught in the trawl net when the steamer was at work 

 South of the Calf of Man in June, 1905. The parasites 

 were confined to the head of the fish and were mostly 

 round the gill slits. A single specimen was taken some 

 years ago, but owing to its contracted state could not be 

 worked out. The parasite measures about 2 mm. and the 

 body is of an oval form, thin and flat. The suckers are 

 rather difficult to make out, and so far as can be seen the 

 posterior one has no hooks. Until more specimens are 

 secured it is probably better to merely record its 

 occurrences and leave it unnamed. 



(4) Acanthocotyle sp. — Plate VIII., figs. 2-4. 



A much contracted specimen, about 1*8 mm. long, 

 belonging to this genus, described by Monticelli in 1888, 

 was found when examining washings from trawl refuse 

 brought up in Fishguard Bay in June, 1905. The usual 

 habitat of the members of this genus is on the skin of 

 skates and rays, and as a number of rays were taken in 

 Fishguard Bay it is practically certain that the Trematode 

 had been detached after the fish were captured. The 

 genus is easily recognised by the large posterior sucker 

 armed with numerous rows of teeth, and by the presence 

 of a small secondary sucker or adhesive disk on the 

 margin of the large one. The shape and position of the 



