1 16 Di . J. R. Tosh on the 



almon, usually in the stomach, seldom below the pylorus. 

 Many are sexually mature, and if kept in fresh water will 

 often extrude their eggs, which undergo a direct development. 



yiscaris ohtusocaudata^ Zed., Rud. Entoz. t. ii. i. p. 177. 



Only one specimen was obtained from the stomach. It 

 measures mm. Others may have been overlooked. 



Di'sfoma van'cum, Rud. Entoz. t. ii. i. p. 396. 



This well-known form is the most constant parasite of the 

 salmon. It varies in size from 2-3 mm. and occurs as 

 noticeable yellow specks on the walls of the oesophagus and 

 stomach, rarely in the integline. The colour is from the 

 yellow-brown ova in the uterus. The usual infection is up 

 to 40 or 50. 



Distoma ocreatum, Rud. Entoz. t. ii. i. p. 397. 



Large infections of this species were occasionally found 

 floating in a watery mucus in the stomach above the bend. 

 It was not observed attached to the stomach-walls like the 

 preceding species. It occurs more frequently in the sea-trout 

 than in the salmon, and especially after a diet of herring. 



Distoma Miescheri^ Zschokke, Verhand. naturforsch. Gesell. 

 Basel, viii. Theil, 3 Heft. 



A few solitary specimens in the gullet adhering to the 

 mucous membrane. Brown in colour, with stalked ventral 

 sucker, it varies in length from 9-17 mm. The species is 

 described and figured by Prof. Zschokke from the Rhine 

 salmon. 



Echinorhynchus acus, Rud. Entoz. t. ii. i. p. 278. 



E. acus was found attached in the lower intestine. The 

 specimens varied in length from 12-31 mm. Not common. 



Echinorhynchus proteus, Westrumb. De Helm. Acanth. p. 37, 

 no. 66. 



E. proteus has been described under many names. It 

 occurred in the lower intestine with the proboscis buried up 

 to the neck and with the bulb expanded but out of sight. 

 Length 6-9 ram. Commoner than E. acus. 



Echinorhynchus angustatus, Rud. Entoz. t. ii. i. p. 266. 



E. affinis is given by Rudolj)hi as a synonym. My 



