-3- 
Thyroid hyperplasia/neoplasia was seen in a roach (RTLA 2281; 
W. Slooff) and Amazon mollies (RTLA 2271, 2328; A. D. Woodhead). 
The spleens of the Amazon mollies were substantially replaced by 
well-differentiated thyroid follicles raising the question of 
whether this represents ectopic thyroid, which is known to occur 
in various organs Including spleen, or a metastasis. 
A series of non-neoplastic developmental anomalies in sea 
lamprey (RTLA 2227-35; G. W. Piavis) originated from northeast 
Michigan. Coincidentally an earlier series of teratoid anomalies 
in lake trout were also from Michigan (RTLA 1961-80; J. Hnath). 
Another dysmorphogenic anomaly occurred in the anterior ventral 
trunk region between the pectoral fins of a brown trout (RTLA 
2300; B. L. Munday) as if an attempt at Siamese twinning. 
Other non-neoplastic lesions included: an amebic (X-cell) 
pseudotumor in an Atlantic cod (RTLA 2290; C. Morrison) (for 
evidence that the X-cell is a unicellular organism see Dawe, C. J. 
Polyoma tumor in mice and X-cell lesions in fish viewed through 
microscope and telescope. The Proceedings of The Eleventh In¬ 
ternational Symposium of The Princess Takamatsu Cancer Research 
Fund; Phyletic Approaches to Cancer; Nov. 1981 publication ex¬ 
pected); an adenomatous hyperplasia of the epithalamus of a giant 
tortoise (RTLA 2248; R. Mueller) described in the paper cited 
in the "Accessions’* section of this report; prokaryote infections 
in razor clams (RTLA 2303-14; S. V. Otto); lymphocystls in a fat 
sleeper (RTLA 2288; F, J. Schwartz and R. Mdrquez) and adenofi- 
brosis in bream (RTLA 2283-4; W. Slooff). 
Computerized retrieval of specimen information is possible 
by pertinent key words. Utilizing this system, a complete index 
of all neoplasms through 1980, based on system of origin, will 
be published in November 1981. See reference, "Harshbarger, 
Charles and Spero," in the section, "Papers Since 1979," below. 
REFERENCE LIBRARY 
The comprehensive computerized library on neoplasms and related 
disorders in ectothermic animals was enlarged and consolidated. 
PAPERS SINCE 1979 
Harshbarger, J. C. 1980. Neoplasms in zoo poikllotherms emphasizing 
cases in the Registry of Tumors in Lower Animals. In: Symposia of 
the National Zoological Park: The Comparative Pathology of Zoo 
Animals, R. J. Montali and G. Migaki (eds.), pp. 585-591, Smith¬ 
sonian Institution Press: Washington, D. C. 
