342 GEORGINA SWEET. 



typlilops," ' Traus. Roy, Soc. S. Aus.,' 1891, pp. 154 et seq., and 

 pp. 283 et seq. 



11. Sweet. — " Contributions to our Knowledge of the Anatomy of Noto- 



ryctes typhlops," Parts I and II, 'Proc. Roy. Soc. Vic.,' vol. xvii, 

 N.S., 1904. 



12. Sweet. Part III, 'Quart. Journ. Mic. Sci.,' vol. 50, 1900. 



13. Wilson. — "On the Myology of Notoryctes typhlops," 'Trans. Roy. 



Soc. S. Aus.,' 1894. 



EXPLANATION OF PLATES 19 and 20, 



Illustrating Miss Greorgina Sweet's paper on "The Skin, Hair, 

 and Reproductive Organs of Notoryctes." 



Reference Letters. 



a. Artery, a.gl. Anal gland, a.t. Adipose tissue, a.v.c. Anterior vaginal 

 canal, blr. Bladder, c.c. Corpora cavernosa, c.f.o. Common follicular 

 opening, c.s. Corpus spongiosum, cl.o. Cloacal opening, d. Dermis. 

 e. Epidermis, g.t. Gland tubes, l.h. Large hair. l.vx. Lateral vaginal 

 canal, m. Muscles of hair, mod.v.c. Median vaginal canal, r. Rectum. 

 r.s. Root slieath of single hair, s.c.t. Dense connective tissue, s.h. Small 

 hair. s.g. Sebaceous gland, s.g.d. Sebaceous gland duct. s.o. Sense organ, 

 ur. Ureter, ura. Urethra, ur.gs. Urogenital sinus, ut.b. Body of the 

 uterus, ut.n. Neck of the uterus, v. Vein, vag.c. Vaginal caecum. 



(All figures except Fig. 17 were drawn by the aid of the camera lucida. 

 For Figures 1 — 11 and 17 I am indebted to Professor Spencer.) 



Plate 19, Figs. 1—12 and 17—18; Plate 20, Figs. 13—16. 



Fig. 1. — Horizontal section through the skin of the back, across a typical 

 group of three bundles of hairs, showing large {l.h.) and small hairs {s.h.), 

 sebaceous gland {s.g.), and duct of same {s.g.d.). Zeiss C, oc. 2. 



Fig. 2. — Portion of stratum corneum, showing two bundles of hairs, each 

 emerging from common follicle {c.f.o.), and showing distinct root sheaths 

 {r.s.) below. Zeiss C, oc. 2. 



Fig. 3. — Longitudinal vertical section through two bundles of hairs ia 

 ischiotergal region, showing slightly thickened epidermis {e), large {l.h.) and 



