-23- 
RTLA 1777 (contd.) 
Diagnosis: Acute necrotizing enteritis 
Submitter: I. Gorman 
RTLA 1778. White sucker, Catostomus commersoni 
Material: Two pieces of a lesion adhering to gut and liver 
Habitat: Bozen Kill (part of Hudson River drainage. New York) 
Diagnosis: Pancreatitis 
Submitter: E. G. Hayunga 
RTLA 1779. European flat oyster, Ostrea edulis 
Material: Six microscope slides 
Habitat: Ribadeo, Galicia, Spain; animals originally imported 
from Italian Adriatic 
Diagnosis: Hematopoietic neoplasm 
Submitter: D. J. Alderman 
Reprint: Alderman, D. J., P. van Banning, and A. Perez-Colomer. 
Two European Oyster (Ostrea edulis ) Mortalities Asso¬ 
ciated with an Abnormal Haemocytic Condition. Aqua¬ 
culture, W: 335-340. 1977. 
RTLA 1780. European flat oyster, Ostrea edulis 
Material: Four microscope slides 
Habitat: Carantec, Finisterre, France 
Diagnosis: Aber disease; parasitized by the haplosporidan, 
Marteilia refringens 
Submitter: D. J. Alderman 
Reprint: Alderman, David. Foreign Diseases Hazard British Shell¬ 
fish. New Scientist, pp. 122-124, 8 July 1974. 
RTLA 1781. European flat oyster, Ostrea edulis 
Material: One microscope slide 
Habitat: Menai Straits, North Wales 
Diagnosis: Systemic herpes virus infection 
Submitter: D. J. Alderman 
RTLA 1782. Lobster, Homarus vulgaris 
Material: One microscope slide 
Habitat: Maintained in experimental tanks at Ministry of Agri¬ 
culture, Fisheries and Food, Conway, North Wales 
Diagnosis: Fungi ( Ramularia sp.) in gut chitin 
Submitter: D. J. Alderman 
RTLA 1783. Coho salmon, Oncorhynchus kisutch 
Material: One microscope slide 
Diagnosis: Ependymoblastoma 
Submitter: G. E. Hoskins 
RTLA 1784. Congo tetra, Phenacogrammus interruptus 
Material: Two microscope slides 
Habitat: Metro Toronto Zoo, Toronto, Canada 
Diagnosis: Well-differentiated epidermal carcinoma 
