. The chordates. Chordata. Fig. 12. Skin of lungfish, Proto- plerus; section perpendicular to surface; much enlarged, (c) Dermis (corium); (e) epidermis; (</) multi- cellular gland; (u) unicellular gland. (Courtesy, Kingsley: "Compara- tive Anatomy of Vertebrates," Philadelphia, The Blakiston Com- pany.). Fig. 13. Diagrams of (.4) nail, (B) claw, and (C) hoof, (e) Unmodified epidermis; (u) unguis (outer plate); (s) subunguis (ventral plate). Upper figures, longitudinal dorsoventral sections; bones of digit in solid black. Lower figures, terminal surface of digit. The unguis and su
. The chordates. Chordata. Fig. 12. Skin of lungfish, Proto- plerus; section perpendicular to surface; much enlarged, (c) Dermis (corium); (e) epidermis; (</) multi- cellular gland; (u) unicellular gland. (Courtesy, Kingsley: "Compara- tive Anatomy of Vertebrates," Philadelphia, The Blakiston Com- pany.). Fig. 13. Diagrams of (.4) nail, (B) claw, and (C) hoof, (e) Unmodified epidermis; (u) unguis (outer plate); (s) subunguis (ventral plate). Upper figures, longitudinal dorsoventral sections; bones of digit in solid black. Lower figures, terminal surface of digit. The unguis and subunguis are thickened regions of the stratum corneum. (After Boas. Courtesy, Kingsley: "Comparative Anatomy of Vertebrates," Phila- delphia, The Blakiston Company.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : Blakiston
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