JOURNAL OF MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATE XXX, 



niustratiug Mr. J. E. Blomfield's Paper on " The Thread- 

 cells aud Epidermis of Myxine. 



Fig. 1. — Section of the body-wall of Myxine gluiiaosa, showing — «, 

 epidermis ; b, dermis ; c, subcutaneous fatty tissue ; d, club-cells or yellow- 

 staining cells ; e, spider-cells or granular cells of Foettiuger. Picric acid 

 preparation stained with picro-carmine. 



Fig. 2. — Various cells from the epidermis. Series a, goblet cells; b, 

 cells from the basal layer of the epidermis, showing expanded bases of the 

 cells ; c, cells from the intermediate layers. 



Fig. 3. — " Spider " cells (granular cells of Foettinger in Petromyzon) 

 from the epidermis. 



Fig. 4. — " Yellow " cells (club-cells of Foettinger) from the epidermis. 



Fig. 5. — Portion of the content.s of a lateral mucus-gland, showing the 

 " thread " cells aud stroma of " spider " cells. 



YiG. G. — Thread cells from a gland, showing their mode of staining with 

 picrocarmiue. 



Fig. 7. — Thread cells, showing the mode of winding of the thread — 

 a, b, c, different views of same cell under different foci. 



Fig. 8. — Section through a young gland, showing continuity of the gland 

 cells with the epidermic cells and the origin of the thread cells from the 

 epidermic cells, m, muscular investment of the gland sac ; d, club-cells or 

 yellow-staining cells of the epidermis ; e, granular cells stained by carmine, 

 identical with the ' spider-cells ' of Fig. 1. Alcohol was used in preserving 

 this specimen; picric acid in the case of Fii?. 1. 



^iG. 9. — Development of a thread cell, showing gradual deposition of 

 tl>e yellow-staining material. 



Fig. 10. — Mucus from the surface of a Myxine, showing the thread cells 

 unwinding, threads, mucus cells, and epidermic cells. 



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