68 
RTLA 518. Brown trout, Salmo trutta 
Material: One microscope slide; one color transparency 
Diagnosis: Fibroma 
Submitter: L. E. Mawdesley-Thomas (via D. Bucke) 
RTLA 
519. Haddoc 
Material: 
Diagnosis: 
Submitter: 
Reprint: 
k, Melanogrammus aeglefinus 
Two microscope slides; one color transparency 
Fibroma 
L. E. Mawdesley-Thomas (via D. Bucke) 
[see RTLA 515] 
RTLA 
520. Sea morid 
Material: Two microscope slides 
Diagnosis: Parasitic (?) cyst 
Submitter: L. E. Mawdesley-Thomas 
Reprint: [see RTLA 515] 
(via D. Bucke) 
RTLA 521. Whiting, Merlangius merlangus 
Material: Two microscope slides 
Diagnosis: Fibroma 
Submitter: L. E. Mawdesley-Thomas (via D c 
Reprint: [see RTLA 515] 
Bucke) 
RTLA 522. Plaice, Pleuronectes platessa 
Material: Two color transparencies 
Diagnosis: Pigmented parasitic cyst 
Submitter: L. E. Mawdesley-Thomas (via D. Bucke) 
RTLA 523o Sandbar shark, Carcharhinus milberti 
Material: Four microscope slides 
Diagnosis: Reticulum cell sarcoma, spleen (only known example of 
a lymphoreticular or hematopoietic neoplasm in 
Chondrichthyes) 
Submitter: R. O'Gara and V. T. Oliverio 
RTLA 524. Sandbar shark, Carcharhinus milberti 
Material: Fifteen microscope slides 
Diagnosis: Granulomatous reaction to infection by acid-fast 
organism [ Mycobacterium (?), Nocardia (?)] 
Submitter: R. O'Gara and V. T. Oliverio 
RTLA 525. Walleye, Stizostedion vitreum vitreum 
Material: Two pieces of tissue; two microscope slides 
Diagnosis: Granulomas in response to fungi 
Submitter: C. E. Smith 
RTLA 526. Chinook salmon, Oncorhynchus tshawytscha 
Material: Kidney 
Diagnosis: Well-differentiated nephroblastoma with lithiasis 
Submitter: J. G„ Hnath 
RTLA 527. Rainbow trout, Salmo gairdneri 
Material: Liver 
Diagnosis: Hepatoma 
Submitter: J. G. Hnath 
