292 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



hooks. The hooks are sharply bent backwards. Their 

 proximal halves are thick, the distal halves slender and 

 sharply pointed. Large and small worms present the 

 same characters, so far as the proboscis is concerned. 

 There is no distinct neck ; sometimes a large bulla is 

 formed immediately behind the proboscis, and occasion- 

 ally a much smaller bulla may be formed at the extreme 

 posterior end of the body. 





Fig. 8. Tip of the proboscis of Echtnorhynchus acus. x 80 dia. 



Protozoa. 



Lymphocystis johnstonei , "Woodcock (Text-fig. 9 and Plate VI.). 



Some time ago Mr. Scott sent me some specimens of 

 flounders, which had been collected in the Eiver Lime 

 during the autumn of 1904, for the Piel Hatchery. A 

 considerable number of the flounders from this area are 

 infected with the sporozoan, described in the last Eeport 

 from this Laboratory. Such infection is rare in the 

 flounders from other parts of this district, although when 

 in Luce Bay during November, 1904, four large fish of 

 this species were obtained, and two of these were infected 

 with the sporozoan in question. Some of the flounders 

 from the Lime, however, had a tumour projecting from the 

 ventral body margin immediately behind the anus, and 

 at first sight this appeared to be caused by the terminal 

 portion of the rectum being extruded, as sometimes is the 

 case when the fish is badly squeezed in the trawl. Closer 



