204 Trans. Acad. Sci. of St. Louis. 



palpebral lacrymal gland with an excretory duct between them. To the left 

 the orbicularis muscle. — 8, Vertical (sagittal) section through the upper 

 eyelid and eyeball (white), just through the middle line. The small round 

 dark body in tUe subconjunctival tissue above the tarsus (-s ) is an iso- 

 lated small lacrymal gland. 



Plate XXVI. — 9, The same lacrymal glands as in Fig. 8, under a high 

 magnifying power. — 10, Three lobules of the palpebral lacrymal gland in 

 the upper eyelid, and an excretory duct. 



Plate XXVII. — 11 J The distal end and external orifice of one of the ex- 

 cretory ducts of the orbital lacrymal gland (vertical section). — 12, Several 

 lobules of the palpebral lacrymal gland of the upper eyelid; upwards 

 an excretory duct from the orbital lacrymal gland. The epithelium of the 

 conjunctiva has fallen off. 



Plate XXVIII. — 13, Vertical section through two lobules of the palpe- 

 bral gland, one with its excretory duct, upper eyelid. — U, A large lobule 

 of the palpebral lacrymal gland with its excretory duct, upper eyelid. 



Plate XXIX. — 15, A large lobule of the palpebral lacrymal gland with its 

 excretory duct. To the right of it a transverse section of an excretory 

 duct from the orbital lacrymal gland. The conjunctival epithelium has 

 fallen off. — 16, The external orifice of the excretory duct of a small iso- 

 lated lacrymal gland in the conjunctiva. Lymphatic infiltration around and 

 near it. To the left the bulbar conjunctiva. The epithelium has fallen off. 



Plate XXX. — 17, Small acinous gland in the upper eyelid close to the 

 nasal canthus ('-^). Vertical section through upper eyelid and eyeball. 

 The lacrymal caruncle is seen below. — 18, The same gland under a higher 

 magnifying power. 



Plate XXXI. — 19, 20, Acinous glands from the conjunctiva near the 

 lacrymal caruncle, upper eyelid. 



Plate XXXII. —21, Horizontal section through the lower eyelid a little 

 below the caruncle. An acinous gland imbedded in the loose connective 

 tissue. Upwards to the left side the conjunctival sac — 22, A part of the 

 same gland and its duct under a higher magnifying power. 



Plate XXXIII, — 23, Horizontal section through the eyelids showing the 

 tarsal tissue, including some Meibomian glands, some acino- tubular glands 

 in the middle line, and small acinous glands in the conjunctiva at both the 

 temporal and nasal edges of the tarsus (A, B). — 24, The same. The skin 

 and orbicular muscle torn off. 



Plate XXXIV. —25, Similar section to Figs. 23 and 24. — The dark lines 

 in the conjunctiva represent the lymphatic infiltration. — 26, Somewhat ob- 

 lique vertical section through the upper eyelid, showing the lower part of a 

 Meibomian gland and its excretory duct. To the right of it appears to be a 

 second layer of glandular tissue ; this is, however, only apparent and due to 

 the obliqueness of the section. To the right of the excretory duct lies the 

 muscle of Riolan and the dark root of an eyelash (negro) . 



Plate XXXV. — 27, Vertical section through the tarsal tissue and Mei- 

 bomian glands parallel to the surface, from the lower eyelid, close to the 

 conjunctival surface. — 29, Section parallel to the surface through the tem- 

 poral third of the upper eyelid, showing Meibomian glands with dilated 

 central ducts, and above them the acino-tubular gland as dark patches. 



Plate XXXVI. — 28, Similar section to that shown in Fig. 27. 



