ACCESSIONS 
RTLA 1838. American oyster, Crassostrea virginica 
Material: One paraffin block; pathology report 
Habitat: Chesapeake Bay: Fishing Bay/Duck Island 
Diagnosis: Procaryote cytoplasmic inclusion: stomach epithelium; 
extensive infestation by Bucephalus cuculus 
Submitter: S. V. Otto 
RTLA 1839, 1840. 
Material: 
Habitat: 
Diagnosis: 
Submitter: 
American oyster, Crassostrea virginica 
One paraffin block and pathology report each 
Chesapeake Bay: Fishing Bay/Duck Island 
Procaryote cytoplasmic inclusion: digestive diverticulum 
S. V. Otto 
RTLA 1841. American oyster, Crassostrea virginica 
Material: One paraffin block; pathology report 
Habitat: Chesapeake Bay: Fishing Bay/Duck Island 
Diagnosis: Procaryote cytoplasmic inclusion: gut epithelium 
Submitter: S. V. Otto 
RTLA 1842, 1843. 
Material: 
Habitat: 
Diagnosis: 
Submitter: 
American oyster, Crassostrea virginica 
One paraffin block and pathology report each 
Chesapeake Bay: Fishing Bay/Duck Island 
Procaryote cytoplasmic inclusion: digestive diverticulum 
S. V. Otto 
RTLA 1844, 1845. 
Material: 
Habitat: 
Diagnosis: 
Submitter: 
American oyster, Crassostrea virginica 
One paraffin block and pathology report each 
Chesapeake Bay: Fishing Bay/Duck Island 
"Ovacystis" (Papova virus) and procaryote cytoplasmic 
inclusion: gonad 
S. V. Otto 
RTLA 1846. American oyster, Crassostrea virginica 
Material: One paraffin block; pathology report 
Habitat: Chesapeake Bay: Fishing Bay/Duck Island 
Diagnosis: Procaryote cytoplasmic inclusion: digestive diverticulum 
Submitter: S. V. Otto 
RTLA 1847. Brown bullhead, Ictalurus nebulosus 
Material: 
Habitat: 
Diagnosis: 
Submitter: 
Variously sized pieces of skin and subcutaneous tissue 
overlain with black growths; 1 black and white photo¬ 
graph 
Lake Waubesa, Wisconsin 
Invasive melanophoroma 
W. E. Ribelin 
RTLA 1848. Finescale menhaden, Brevoortia gunteri 
Material: Section of body wall with external knobby growth 
Habitat: National Marine Fisheries Service Laboratory, Port 
Aransas, Texas 
