SEA-FISHEEJES LABORATORY. 103 



INTERNAL PARASITES AND DISEASED 

 CONDITIONS OF FISHES. 



By Jas. Johnstone. 



Contents 



1. COENOMORPHUS LINGUATULA (van Beneden). 



2. TETRARHYNCHUS BENEDENI (Crety). 



3. GYROCOTYLE URNA, Grube and Wagener. 



4. GYRODACTYLUS ELEGANS, Nordmann. 



5. MELANOTIC SARCOMA IN RATA BATIS. 



6. MELANOTIC SARCOMA IN RAIA CLAVATA. 



7. FIBRO-SARCOMA FROM GADUS CALLARIAS. 



8. LYMPHOSARCOMA PRODUCING EXOPHTHALMOS IN 



PLEURONECTES FLESUS. 



9. ECTASIA OF THE SENSORY CANALS OF RAIA CLAVATA 



WITH INTRA-CYSTIC MYXO-FIBROMATA. 



10. CUTANEOUS PAPILLOMA FROM HIPPOGLOSSUS 

 VULGARIS. 



1. Coenomorphus linguatula (van Beneden).* 



I am indebted to a pupil of mine, Mr. Thomas 

 Newby, mate of the Fleetwood steam trawler " Cygnet," 

 for four specimens of this most interesting Cestode. 

 They were taken from a Coalfish (Gadus virens) caught 

 to the north-west of St. Kilda, in 130 fathoms of water. 

 Mr. Newby had seen them frequently, but only in coal- 

 fish. He noticed that the worms were of a very unusual 

 appearance and preserved part of the liver of the host in 

 ice until the arrival of his vessel in port. Mr. T. R. 

 Bailey, Port Sanitary Inspector at Fleetwood, sent on 

 the specimen to me. All four worms were alive when 



* The only references to the occurrence of this Cestode which 1 can 

 find are : — 



1853. P. J. van Beneden, Bull, de V Acad. Roy. Belgique, T. XX, 

 Partie II, p. 260, pi. I, Bruxelles. 



1854. Diesing, Sitzungsb. K. A/sad. Wissensch. Wicn. XIII. p. 591. 



L889. Lonnberg, E. ' Ueber eine eigcnthiimliehe Tetrarhynchidcn - 

 Larve.' Bihang till K. Svenska Vet.-Akaa. Handlingar, Bd- 15, aid. IV. 



Xo. 7, pp. 1-48, pis. MIL Stockholm. 



