. A manual of zoology. Zoology. 474 CHORDATA. branches ending in tactile discs. Though long known among terrestrial vertebrates, these have recently lieen found in fishes. The (iiih-shapeJ corpuscles (also known as ]\!iiiaii corpuscles, iig. Si) are allied to the tactile corpuscles liy form and mesodermal position, although thev diiTer materially in structure and are not easily to be regarded as ectodermal in origin, since they occur not only in the skin but in deeper structures like the mesentery of the cat. The latter position rentiers their function proldematical. \Miile in the t
. A manual of zoology. Zoology. 474 CHORDATA. branches ending in tactile discs. Though long known among terrestrial vertebrates, these have recently lieen found in fishes. The (iiih-shapeJ corpuscles (also known as ]\!iiiaii corpuscles, iig. Si) are allied to the tactile corpuscles liy form and mesodermal position, although thev diiTer materially in structure and are not easily to be regarded as ectodermal in origin, since they occur not only in the skin but in deeper structures like the mesentery of the cat. The latter position rentiers their function proldematical. \Miile in the terrestrial vertebrates typical scnsor\- epithelium is lack- ing, it attains a high development in the skin of fishes. The dermal nerves pass into the epidermis and end in o\al corpuscles, which, while imbedded in a stratihed epithelium, consist of a single layer of sense and supporting cells. According to structure, ;/<•/-:'(• hillocks (nciiromasts) and tiervc-ciid buds are distinguished. The lirst are the specihc organs of the. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
