-7- 
ACCESSIONS 
RTLA 2220. Zebra danio, Brachydanio rerio 
Material: One microslide; 3 color transparencies 
Habitat: Home aquarium; Silver Spring, Maryland 
Diagnosis: Well-differentiated seminoma 
Submitter: J. B. Nold 
RTLA 2221. Dolphin (fish), Coryphaena hippurus 
Material: Piece of muscle tissue with nodular growth 
Habitat: Gulf Stream, Off Miami Beach, Florida 
Diagnosis: Muscle atrophy, necrosis and chronic inflammation 
probably due to traumatic Injury 
Submitter: W. Kandrashoff 
RTLA 2222. Black bullhead, Ictalurus melas 
Material: Three microslides; 3 color transparencies; 
5 electron micrographs 
Habitat: Final oxidation pond of sewage treatment plant, 
Tuskegee, Alabama 
Diagnosis: Papilloma with virus-like particles 
Submitter: J. Grizzle 
Reprint: Grizzle, J. M., T. E. Schwedler, and A. L. Scott. 
1981. Papillomas of black bullheads, Ictalurus 
melas (Rafinesque), living in a chlorinated sewage 
pond. J. Fish Dis., ^:345-351. 
RTLA 2223. Blue shrimp, Penaeus stylirostris 
Material: Thirteen microslides; 5 black and white photographs 
Habitat: Environmental Research Laboratory, University of 
Arizona, Tucson, Arizona 
Diagnosis: Multifocal nodule formation possibly in response to 
injury of blood vessel walls 
Submitter: D. Llghtner 
RTLA 2224. Brook (speckled) trout, Salvelinus fontinalls 
Material: Twelve microslides 
Habitat: Shingle Shanty Stream, Adirondack Mountains, New York 
Diagnosis: Neurilemmal sarcoma 
Submitter: J. E. Carlisle 
RTLA 2225. Axolotl, Ambystoma mexicanum 
Material: Piece of liver and pancreatic tissue 
Diagnosis: "Normal" 
Submitter: R. Verhoeff-de Fremery 
RTLA 2226. Clawed frog, Xenopus sp. 
Material: Greatly enlarged spleen 
Diagnosis: Splenitis with bacteremia 
Submitter: R. Verhoeff-de Fremery 
