DR. H. WATNEY ON THE MINUTE ANATOMY OP THE THYMUS. 
1119 
Fig. 104. From medulla of follicle of Tortoise, probably twenty-one months 
' old. 
Granular cells, the largest shows concentric rings. 
Fig. 105. From Tortoise, probably eighteen months old. 
From cortex of the follicle, showing epithelioid cells and the reticulum. 
Figs. 106 and 107. From thymus of medium-sized Tortoise. 
Two concentric corpuscles which contain granular cells. 
r. Traces of reticulum. 
Ic. Lymphoid corpuscles. 
Fig. 108. From thymus of medium-sized Tortoise. 
A large cyst, lined by columnar and sub-columnar epithelium. 
h. Masses of haemoglobin. 
Fig. 109. Camera lucida, obj. 2, X 75, oc. III., obj. 4. 
Transverse section of one-half of the thymus of foetal Babbit eighteen days 
old. 
a. Process formed of epithelioid cells, continuous with the thymus. 
References.* 
1. Haugsted. Thymi in homine ac per seriem animalium descriptio. Hafniae, 1832. 
2. Simon. A Physiological Essay on the Thymus Gland. 1845. 
3. Friedleben. Physiologie der Thymusdrtise. Frankfurt, 1858. 
4. Rufus of Ephesus. Edit. Londini, p. 38. 1726. 
5. Galen. Opera Omnia. Lipsise, edit.; D. C. G. Kuhn, p. 674. 1823. 
6. Mobius. Observations medicse, p. 15. Helmstadt, 1730. 
7. Glisson. De rhachitide, p. 15. 1671. 
8. Mangetus. Theatrum anat. Genevae, Lib. iii., Pars, ii., Cap. iv., p. 182. 1717. 
9. Verheyen. Corpor. humani anat. Edit. iii. Bruxelles, Lib. i., p. 276. 1726. 
10. Hewson. Experimental Inquiries. London, 1777. 
11. A elsch. Anatome muris alpini. Ephemerid acad. nat. cur. Dec. i., a rm , i., 
obs. 160, p. 339. 
12. Harder. Anatome muris alpini. Ephemerid acad. nat. cur. Dec. ii., ann. iv. 
obs. 122, p. 238. 1686. 
13. Scheuchzer. Philosophical Transactions, vol. xxxiv., p. 239. 1727. 
* The papers of the following authors I have been nnable to obtain; it was therefore necessary to 
quote them from other sources :— 
Velsch. Hugo. Westpetal. 
Harder. Restelli. Schwarze. 
Cuyiee. Robin'. Bizzozero. 
7 D 
MDCCCLXXXII. 
