The American journal of anatomy . food. J. Exp. ?^Ied., N. Y., 19, pp. \., AND MissoROLi, A. 1913 Quoted after Biedl, A. Innere Sekre- tion, Zweite Auflage, Berlin u. Wien, Irban u. , X. S. 1905 .Sulla attivitii secretoria della ghiandola tiroide in alcuni condizione morbose. Lo Sperimentale, , C. 1907 On changes in the structure of the thyroid glaml in wild rats under the influence of altered dietetic conditions. Iroc. Ihysiol. Soc, Loud. :May 18, pp. , R. v. 1889 Ueber die Bedeutung der Schilddriise. Eorresp. f. Sclnveit- zcr Acrfztc. 19.
The American journal of anatomy . food. J. Exp. ?^Ied., N. Y., 19, pp. \., AND MissoROLi, A. 1913 Quoted after Biedl, A. Innere Sekre- tion, Zweite Auflage, Berlin u. Wien, Irban u. , X. S. 1905 .Sulla attivitii secretoria della ghiandola tiroide in alcuni condizione morbose. Lo Sperimentale, , C. 1907 On changes in the structure of the thyroid glaml in wild rats under the influence of altered dietetic conditions. Iroc. Ihysiol. Soc, Loud. :May 18, pp. , R. v. 1889 Ueber die Bedeutung der Schilddriise. Eorresp. f. Sclnveit- zcr Acrfztc. 19. TKK .lOTKNAL l)F ANATOMY, VOL. 19, .\0. 1 54 R. R. BENSLEY EXPLANATION OF PLATE 1 A group of follicles from the thyroid gland of the opossum, fixed in forma-lin Zenker, stained with brasilin-wasserblau. X 1050. In the outer poles of thecells a material differentially stained, similar to the intrafoUicular colloid. Intwo cells droplets of colloid destined for storage. NO[lMAL MODE OF SECRETION IN THYROID (iLAND ILAll: 1. 55 THE INFLUENCE OF DIET AND IODIDES ON THE HYPERPLASIA OF THE THYROID GLAND OF OPOSSUMS IN a\PTIVITY R. R. BENSLEY ?From the Hull Labordtartj of Anatomij_ University of Chicago In a recent paper on thyroid gland of the opossum (14) Ishowed that, when these animals are brought under domestica-tion, the thyroid gland undergoes a prompt and characteristicchange, marked by hyperplasia of high degree, by disappear-ance of the stored colloid and of the intracellular crystals, andby the appearance in the free ends of the epithelial cells ofgranules which I interpreted as a new secretion antecedent. Ishowed also that this reaction was not a seasonal variation asso-ciated with hibernation, since animals captured at intervalsthroughout the winter months presented always a normal type ofgland structure, while those kept for a few weeks in the labora-tory, had hyperplastic glands. In one animal kept until June1, also, there was no indication of spontaneous revers
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