578 
MR. E. C. BABER ON THE STRUCTURE OF THE THYROID GLAR'D. 
jfiete to allow of its being included in this communication, partly owing’ to its great 
delicacy of structure, and partly to the difficulty of obtaining this gland perfectly 
fresh, a condition which is absolutely necessary in order to examine its minute 
anatomy. I shall therefore merely refer to this gland incidentally on one or two 
points in the course of the paper. 
BIBLIOGRAPHY. 
The following are the chief publications to which it will be necessary to refer in the 
present communication :— 
Leydig : ‘ Lehrbuch der Histologic.’ 1857. 
Henle : ‘Handbuch der Systematischen Anatomie des Mensclien,’ vol. ii. 1866. 
Kolliker : ‘ Handbuch der Gewebelehre.’ 5th edition, 1867. 
Peremeschko : “ Ein Beitrag zum Bau der Schilddrtise.” Zeitschrift flir Wissen- 
schafthche Zoologie, xvii. 1867. 
Bolleston : ‘Forms of Animal Life.’ 1870. 
Virchow: ‘ Pathologie des Tumeurs.’ French translation. Lect. 22, vol. iii. 1871. 
W. Muller : Jenaische Zeitschrift ftir Medizin und Naturwissenschaft, vi. 1871. 
Verson : Article “Thyroid Gland,” in Stricker’s ‘ Human and Comparative His¬ 
tology.’ Sydenham Society’s translation, by H. Power, vol. i. 1871. 
P. A. Boechat : ‘ Becherches sur la Structure Normale du Corps Thyroide.’ These. 
Paris, 1873. 
Frey : ‘ Histology and Histo-Chemistry.’ 4th edition, translated by Barker, 1874. 
Baber : “ Contributions to the Minute Anatomy of the Thyroid Gland of the Hog.” 
Philosophical Transactions of the Boyal Society, Vol. 166, Part II. 1876. 
O. Zeiss : ‘ Mikroskopische Untersuckungen uber den Bau der Schilddruse.’ Inau¬ 
gural Dissertation. Strassburg, 1877. 
Huxley and Martin : ‘Practical Biology.’ 4th edition, 1877. 
Klein: “Observations on the Structure of Cells and Nuclei." Quarterly Journal 
of Microscopical Science, vol. xviii., new series. 1878. 
MACROSCOPIC APPEARANCES. 
Before entering on the histology of the gland, it may be well to mention the 
following points in regard to its macroscopic anatomy which have been noted in this 
research (compare Simon, “ On the Comparative Anatomy of the Thyroid Gland,’ 
Phil. Trans., 1844; and Owen, ‘Anatomy and Physiology of the Vertebrata,’ vol. i., 
1866):— 
Mammalia. —In some of these (such as the Dog, Sheep, &c.) the gland consists of two 
distinct halves, situate one on either side of the windpipe. In other instances the 
two lateral halves are united across the median line. For example, on injecting one 
lobe of the thyroid of a Babbit (11 v r eeks old) by the method of puncture, what 
