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RTLA 602. Australian rock oyster, Crassostrea commercialis 
Material: Four microscope slides 
Diagnosis: Polypoid pericardial tumor of Leydig cell origin 
Submitter: P. Dinamani 
Reprint: Dinamani, P, and Peter H„ Wolf. Multiple Tumors in the 
Pericardial Cavity of an Australian Rock Oyster, Crassostrea 
commercialis (Iredale and Roughley). Int. J. Cancer, 11 : 
293-299. 1973. 
RTLA 603. Longnose gar, Lepisosteus osseus 
Material: Eight microscope slides; one photograph 
Diagnosis: Benign epithelioma on the pelvic fin 
Submitter: J. D. Hendricks 
RTLA 604. Staghorn coral, Acropora 
Material: One gross specimen 
Diagnosis: Polyp; possibly in 
Submitter: D. P. Cheney 
Reprints: [see RTLA 599] 
formosa 
response to trematode parasite 
RTLA 605. Staghorn coral, Acropora formosa 
Material: One gross specimen 
Diagnosis: Polyp; possibly in response to trematode parasite 
Submitter: D. P. Cheney 
Reprints: [see RTLA 599] 
RTLA 606. Staghorn coral, Acropora formosa 
Material: One gross specimen 
Diagnosis: Polyp; possibly in response to trematode parasite 
Submitter: D. P. Cheney 
Reprints: [see RTLA 599] 
RTLA 607. Guppy, Poecilia reticulata 
Material: One gross specimen 
Diagnosis: Developmental defect composed of striated muscle and bone 
Submitter: J. S. Laurie 
RTLA 608. Weakfish, Cynoscion regalis 
Material: Eight microscope slides; two photographs 
Diagnosis: Early well-differentiated lipoma versus developmental anomaly 
Submitter: J. D. Hendricks 
Reprints: Tubiash, Haskell S. and Jerry D. Hendricks. A Possible 
Lipoma in the Weakfish, Cynoscion regalis (Bloch and 
Schneider), [in preparation]. 
RTLA 609. Hogchoker, Trinectes maculatus 
Material: Six microscope slides 
Diagnosis: Well-differentiated lipoma or anomalous deposit 
Submitter: M. W. Newman 
RTLA 610. Croaker 
Material: Three consecutive caudal vertebrae 
Diagnosis: Multiple exostosis of the neural and haemal spines 
Submitter: M. Landolt 
