570 GEORGINA SWEET. 



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 Bd. V, Heft 14, und W. Nachtrag, 1S93, 1S95. 



7. Klein. — 'Quart. Jouin. Mic. Soc.,' vol. xxi. 



8. Slon.\ker, J. R. — "The Eye of the Common American Mole (Scalops 



aquaticus niaclirinus)," 'Jonrn. of Comparative Neurology,' vol. 

 xii, 1902, p. 335. 



9. Spencek, W. B. — " lleport of Horn ScienliCc Expedition to Central 



Australia," Pt. ii, ' Zoology.' 



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11. Stirling, E. C.-' Trans. Roy. Soc. S. Australia,' 1891. 



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EXPLANATION OF PLATE 31, 



Illustrating Miss Georgina Sweet's '^Contributions to our 

 Knowledge of the Anatomy of Notoryctes typhlops, 

 Stirling. Part III.— The Eye." 



Reference Letters. 



c.n. Nodule of cartilage, c.s. Conjunctival sac. e.d. Blind external duct. 

 f.c. Conical fibrous capsule, l.g. Lachrymal glands, l.g.d. Laclirymal duct. 

 m. Muscle bands, m.l. Internal molecular layer, o.n.f. Optic nerve fibrils. 

 f. Pigment layer, ii.c.e. Fibrous capsule of eye :=sclero-clioroid. ;•./•'. Cells 

 rc])reseuting retina, s.a. Small artery, v. Veinlet. 



All figures were drawn with the aid of the camera lucida, and Zeiss lenses 

 were used. 



Fig. 1. — Longitudinal section of eye of Notoryctes typhlops, showing 

 long tube {f.c.) containing two muscle bands (»/.) at this level, lachrymal 

 glands [l.fj-') and ducts {l.g.d.), with the precorneal space {c.s?)\ the eye itself 

 with pigmented wall (;;.), and remains of retina (/•.), and surrounded by its 

 own capsule (p.c.e.); two small arteries {s.a) and veinlet {v.) ; also nodule of 

 cartilage {c.n.) posterior to the eye. Zeiss A*, oc. 2. 



Fig. 2. — Longitudinal section of anterior portion of conical tube enlarged, 

 showing same parts as Fig. 1, and, in addition, the longest of the external 



