. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 154.—EYE OF Lacerta muralis, SHOWING THE RING OF BONY SCLEROTIC PLATES. While the eyeball of Reptiles has a globular form (Fig. 154), that of Birds, and especially nocturnal Birds of prey (Owls), is more elongated and tubular, an external larger segment being sharply marked off from an internal smaller one (Fig. 155). The. FIG. 155.—EYE OF AN OWL. Et, retina ; Oh, choroid ; Sc, sclerotic, with its bony ring at t ; CM, ciliary muscle ; Go, cornea ; VN, point of junction between sclerotic and
. Elements of the comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 154.—EYE OF Lacerta muralis, SHOWING THE RING OF BONY SCLEROTIC PLATES. While the eyeball of Reptiles has a globular form (Fig. 154), that of Birds, and especially nocturnal Birds of prey (Owls), is more elongated and tubular, an external larger segment being sharply marked off from an internal smaller one (Fig. 155). The. FIG. 155.—EYE OF AN OWL. Et, retina ; Oh, choroid ; Sc, sclerotic, with its bony ring at t ; CM, ciliary muscle ; Go, cornea ; VN, point of junction between sclerotic and cornea ; Ir, iris ; VK, anterior chamber; L, lens ; Cv, vitreous humour ; P, pecten ; Op, OS, optic nerve and sheath. The dotted line passing across the broadest portion of the circumference of the eye divides the latter into an inner and an outer segment. former is bounded externally by the very convex cornea (Co), and encloses a large anterior chamber (VK}, as well as a complicated ciliary muscle (Crampton's muscle) composed of striped fibres. This muscle is also transversely striated in Reptiles, and in them. 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 Wiedersheim, Robert, 1848-1923; Parker, W. N. (William Newton), d. 1923. London, New York, Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondonnewyorkmacmi
