35 
RTLA 215. Pacific oyster, Crassostrea gigas 
Material: Ten slides; 4 blocks 
Diagnosis: Probable epithelioma of the mantle with conchiolin 
formation 
Submitter: G„ B„ Pauley and C. S. Sayce 
Reprint: Pauley, Gilbert B. and Clyde S. Sayce. An Invasive 
Epithelial Neoplasm in a Pacific Oyster, Crassostrea 
gigas . J. Natl. Cancer Inst., 49(3): 897-902. 1972. 
RTLA 216. Brook 
Material: 
Diagnosis: 
Submitter: 
Reprint: 
trout, Salvelinus fontinalis 
Two slides 
Lymphos arc oma 
C. E. Dunbar 
Dunbar, Clarence E. Lymphosarcoma of Possible Thymic 
Origin in Salmonid Fishes. Natl. Cancer Inst. Monogr. 
31: 167-171. 1969. 
RTLA 217. Rainbow trout, Salmo gairdneri 
Material: One slide 
Diagnosis: Nephroblastoma 
Submitter: C„ E. Dunbar 
Reprint: [see RTLA 62] 
RTLA 218. Croaker 
Material: Gross specimen; 3 photographs 
Diagnosis: Exostosis versus osteoma 
Submitter: J. P. Summerour 
RTLA 219. Gudgeon, Gobio gobio 
Material: Five slides; one 35 mm slide 
Diagnosis: Squamous cell carcinoma 
Submitter: L. E. Mawdesley-Thomas 
Reprint: Mawdesley-Thomas, Lionel E. and David Bucke. Squamous 
Cell Carcinoma in a Gudgeon (Gobio gobio , L.). Pathol, 
Vet., 4: 484-489. 1967. 
RTLA 
220. Bream 
Material: 
Diagnosis: 
Submitter: 
Reprint: 
, Abramis brama 
Four slides; two 35 mm slides 
Lipoma 
L. E. Mawdesley-Thomas 
Mawdesley-Thomas, Lionel E. and D 
Bream (Abramis brama L.) Vet. Rec 
Bucke. A Lipoma in a 
82: 673-674. 1968. 
RTLA 
221. Roach, 
Material: 
Diagnosis: 
Submitter: 
Reprint: 
Rutilus rutilus 
Four slides 
Fish pox 
L„ E. Mawdesley-Thomas 
Mawdesley-Thomas, Lionel E. and David Bucke 
the Roach (Rutilus rutilus L.). Vet. Rec., 
. Fish Pox in 
81(2): 56-57. 
1967. 
RTLA 222. Mummichog, Fundulus heteroclitus 
Material: Four slides and blocks 
Diagnosis: Granulomas 
Submitter: P. P. Yevich 
