6 
RTLA 897. Amazon molly. Poecilia formosa 
Material: Ten lateral hemisections 
Diagnosis: Exhuberant invasive thyroid hyperplasia versus carcinoma; 
visceral granulomas 
Submitter: R. W. Hart 
RTLA 898. Amazon molly, Poecilia formosa 
Material: Thirty-four lateral hemisections 
Diagnosis: Exhuberant invasive thyroid hyperplasia versus carcinoma; 
visceral granulomas 
Submitter: R. W. Hart 
RTLA 899. Rainbow trout, Salmo gairdneri 
Material: Three pieces of tissue from a large subdermal growth lo¬ 
cated along the lateral line below and somewhat posterior 
to the dorsal fin; 2 microscope slides 
Diagnosis: Undifferentiated mesenchymal sarcoma 
Submitter: C. E. Smith 
RTLA 900. Rainbow trout, Salmo gairdneri 
Material: One microscope slide 
Diagnosis: Nephroblastoma 
Submitter: Co E. Smith 
RTLA 901. Rainbow trout, Salmo gairdneri 
Material: Eight pieces of tissue: spleen, liver, kidney, and thymus 
5 microscope slides 
Diagnosis: Lymphosarcoma 
Submitter: Co E. Smith 
RTLA 902o Chum salmon, Oncorhynchus keta 
Material: One paraffin block 
Diagnosis: Nephroblastoma 
Submitter: T. Po T. Evelyn 
RTLA 903. Chinook salmon, Oncorhynchus tshawytscha 
Material: Almost the complete head with both pathologic and normal 
tissue; 1 color photograph 
Diagnosis: Probable malignant lymphoma; tissue too autolyzed for 
definitive diagnosis 
Submitter: G. R. Bell 
RTLA 904. Sockeye salmon (Kokanee), Oncorhynchus nerka 
Material: Two pieces of kidney tissue; 2 microscope slides 
Diagnosis: Granulocytic leukemia versus infection 
Submitter: C. E. Smith 
RTLA 905A & B. Tiger salamander, Ambystoma tigrinum 
Material; Two pieces of tissue; 1 color transparency 
Diagnosis: 905A - Epidermal papilloma 
905B - Intradermal melanophoroma 
Submitter: F. L. Rose 
