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RTLA 2121, Sea lamprey, Petromyzon marinus 
Material: 
Six microslides, 5 of which are controls; 3 color 
transparencies; 2 reprints 
Habitat: 
Diagnosis: 
Submitter: 
Reprint: 
Ocqueoc River, Presque Isle County, Michigan 
Ruptured ectopic notochord with inflammation 
G. W. Piavis 
Piavis, G. W., T. Beckerman and J. H. Howell. 1979. 
Teratoid lesions and other developmental anomalies 
in the sea lamprey, Petromyzon marinus L. J. Fish 
Dis., 2:353-366. 
Piavis, G. W., T. Beckerman and J. H. Howell. 1979. 
Teratoid lesions in the sea lamprey, Petromyzon 
marinus. Anat. Rec., 193:654. 
RTLA 2228, 2229. Sea lamprey, Petromyzon marinus 
Material: 
One microslide (controls: RTLA 2227) and 3 color 
Habitat: 
Diagnosis: 
Submitter: 
Reprint: 
transparencies per case 
Ocqueoc River, Presque Isle County, Michigan 
Teratoid anomaly 
G. W. Piavis 
(see RTLA 2227) 
RTLA 2230. Sea lamprey, Petromyzon marinus 
Material: 
One microslide (controls: RTLA 2227); 3 color trans 
Habitat: 
Diagnosis: 
Submitter: 
Reprint: 
parencies 
Ocqueoc River, Presque Isle County, Michigan 
Papillary epidermoid cyst 
G. W. Piavis 
(see RTLA 2227) 
RTLA 2331, 2232. Sea lamprey, Petromyzon marinus 
Material: 
One microslide and 1 color transparency (RTLA 2231) 
2 microslides (RTLA 2232); (controls: RTLA 2227) 
Habitat: 
Diagnosis: 
Submitter: 
Reprint: 
Ocqueoc River, Presque Isle County, Michigan 
Teratoid anomaly 
G. W. Piavis 
(see RTLA 2227) 
RTLA 2233. Sea lamprey, Petromyzon marinus 
Material: 
Habitat: 
Diagnosis: 
Submitter: 
Reprint: 
One microslide (controls: RTLA 2227) 
Ocqueoc River, Presque Isle County, Michigan 
Teratoid anomaly 
G. W. Piavis 
(see RTLA 2227) 
RTLA 2234. Sea lamprey, Petromyzon marinus 
Material: 
Habitat: 
Diagnosis: 
Submitter: 
Reprint: 
Two microslides (controls: RTLA 2227) 
Ocqueoc River, Presque Isle County, Michigan 
Ectopic hematopoietic myeloid tissue 
G. W. Piavis 
(see RTLA 2227) 
