-3- 
Lymphoma were accessioned in a bagre pintado, Pimelodus 
clarias , (RTLA 2424; H. E. Urdaneta Ch.); a white-throated 
monitor, Varanus exanthematicus albigularis , (RTLA 2426; P. 
Zwart); a medaka, Oryzias latipes , (RTLA 2555; P. W. Wester); 
and a poorly-differentiated lymphoblastic l 3 miphoma in South 
African clawed frogs, Xenopus laevis , experimentally exposed 
to N-methyl-N-nitrosourea (RTLA 2568; R. H. Clothier and M. 
Balls). An undifferentiated neoplasm of probable hematopoietic 
origin was accessioned from a boa constrictor. Boa constrictor , 
(RTLA 2495; P. Zwart) and also from a boa constrictor (RTLA 2525; 
R. Ippen) was a chronic granulocytic leukemia. 
Neural crest tumors, in addition to the possible carcinoid 
tumor already mentioned, included two of pigment cell origin: an 
erythrophoroma in a koi, Cyprinus carpio , (RTLA 2428; G. C. 
Blasiola, Jr.) and a melanophoroma in a yaritanago, Acheilognathus 
lanceolata , (RTLA 2567; Prince Masahito Hitachi). Peripheral nerve 
tumors included a neurilemmal sarcoma in a Hermann’s tortoise, 
Testudo hermanni , (RTLA 2405; J. E. Cooper); and neurilemmomas in a 
striped mullet, Mugil cephalus , (RTLA 2498; N. C. Boustead) and a 
freshwater drum, A. grunniens , (RTLA 2530; J. G. Hnath). A ganglio¬ 
neuroma was accessioned from a channel catfish, Ictalurus punctatus , 
(RTLA 2404; J. Grizzle), a fish species from which surprisingly 
very few tumors have ever been found considering the vast quantity 
raised by aquaculture. Another ganglioneuroma was accessioned 
from a striped bass, Morone saxatllis , (RTLA 2458; A. J. Mitchell). 
Also from the central nervous system was an olfactory neuroepithe¬ 
lioma in a goldfish, Garasslus auratus , (RTLA 2566; Prince Masahito 
Hitachi) and an interesting exuberant probable hyperplasia of the 
leptomeninges in fathead minnows, Pimephales promelas , (RTLA 2469; 
C. E. Smith) exposed to ammonia. 
Ovarian neoplasms determined by several female sterile (fs ) 
genes in fruitflies. Drosophila melanogaster , (RTLA 2570; R. C. 
King) represent experimentally reproducible benign massive pro¬ 
liferations of undifferentiated ovarian cystocytes. Further 
gonadal neoplasms accessioned were granulosa-theca cell tumors in 
a northern pike, Esox lucius , (RTLA 2385; J. G. Hnath) and a koi, 
£. carpio , (RTLA 2534; S. Cohen), a spematocytic seminoma in an 
African lungfish, Protopterus aethiopicus , (RTLA 2473; Prince 
Masahito Hitachi) and possibly a highly pleomorphic, poorly-dif¬ 
ferentiated neoplasm of undetermined cell type which was found asso¬ 
ciated with the ovary of a brown house snake, Boaedon fuliginosus , 
(RTLA 2561; I. Gorman). 
Three significant muscle tumors were accessioned: an excellent 
rhabdomyoma with readily found cross striaeions was contributed in 
a Celebes rainbow fish, Telmatherina ladiglsi , (RTLA 2551; S. 
GoIdes) while the first primitive rhabdomyoblastoma was received 
from a rainbow trout, gairdnerl , (RTLA 2443; N. C. Boustead). 
