- 2 - 
Endemic papilloma were accessioned from two populations: oral 
prickle cell papilloma (RTLA 2222; J. Grizzle) which are highly pre¬ 
valent in black bullhead inhabiting a sewage treatment plant’s oxi¬ 
dation pond; and seasonal (summer regression) rock oyster mantle 
papilloma (RTLA 2329-32; P. H. Wolf) from non-industrial estuaries 
of southeast Australia. 
Hepatocellular neoplasms occurred spontaneously in Atlantic 
tomcod from the Hudson River (RTLA 2252-5; C. E. Smith), one of 
which (RTLA 2255) was a hepatopancreatocarcinoma; in sauger and 
walleye from a lake partially filled in with copper mine tailings 
(RTLA 2257; J. J. Black) and in bream (RTLA 2278, 2280, 2282, 2284; 
W. Slooff) from rivers in The Netherlands. Hepatocarcinoma were 
Induced in an Amazon molly (RTLA 2271; A. D. Woodhead) and rivulus 
(RTLA 2319, 2348; M. P. Chasar). 
Also induced was an intestinal adenomatous polyp in a rain¬ 
bow trout (RTLA 2370; I. Kimura). Other glandular tumors in¬ 
cluded a metastatic mucinous adenocarcinoma in a timor python 
(RTLA 2293; E. Jacobson) and a mucoid adenocarcinoma of un¬ 
determined visceral origin in a Burmese python (RTLA 2296; S. 
Emanuelson). 
Hematopoietic neoplasms included the first unequivocal 
granulocytic neoplasm in an amphibian, a granulocytic leukemia 
in a clawed frog (RTLA 2318; K. L. Hoover and M. Dworkin), and 
lymphoma in a plated lizard (RTLA 2316; A. Heldstab), a rainbow 
trout (RTLA 2251; C. E. Smith), an Atlantic herring (RTLA 2258; 
D. Bucke), an eastern kingsnake (RTLA 2240; E. Jacobson) and a 
northern pike (RTLA 2276; S. Bogovski). 
Reproductive system neoplasms were: a seminoma in a zebra 
danio (RTLA 2220; J. B. Nold), a sertoli cell tumor in an Egyptian 
cobra (RTLA 2336; F. L. Frye) and a granulosa cell tumor in a rain¬ 
bow trout (RTLA 2371; I. Kimura). 
Mesothelioma occurred in two chlnook salmon (RTLA 2238; C. E. 
Smith and RTLA 2241; G. L. Hendrickson). 
Leiomyoma were seen in a sauger (RTLA 2257; J. J. Black) and 
a brown trout (RTLA 2301; B. L. Munday). A leiomyoblastoma was 
seen in a Texas indigo snake (RTLA 2264; F. L. Frye). 
Circulatory system neoplasms included a hemangioendothelio- 
sarcoma in a rainbow trout (RTLA 2239; C. E. Smith), a hemangio¬ 
endothelioma in a flounder (RTLA 2315; S. Bogovski) and a hemangioma 
in an oscar (RTLA 2247; C. A. Gleiser and N. Herwlg). 
Hypernephroma occurred in an Asiatic cobra (RTLA 2334; E. 
Jacobson and L. Kramer) and nephroblastoma occurred in rainbow 
trout (RTLA 2350-1; C. E. Smith). 
