. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 552 ANATOMY OF VERTEBRATES. 368 Mucous follicles abound in the skin of all the BatracMa : they are found in linear rows in parts of the Siren:' are more generally diffused in the Axolotl.^ In the Frog they are spheroidal/ fig. .".68, d, or subdepressed/ situated in the superficies of the derm, c; their ducts perforate the epiderm, h, and terminate by rounded'* or triradiate'' orifices, ib. B. Like the lateral canals of Fishes, they usually contain a clear fluid, which they expel on irritation of their nerve, ib. /.'
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 552 ANATOMY OF VERTEBRATES. 368 Mucous follicles abound in the skin of all the BatracMa : they are found in linear rows in parts of the Siren:' are more generally diffused in the Axolotl.^ In the Frog they are spheroidal/ fig. .".68, d, or subdepressed/ situated in the superficies of the derm, c; their ducts perforate the epiderm, h, and terminate by rounded'* or triradiate'' orifices, ib. B. Like the lateral canals of Fishes, they usually contain a clear fluid, which they expel on irritation of their nerve, ib. /.'' This fluid, in the Newts and Toads, appears to possess an acid or irritating property. A stork will swallow a frog, but rejects a toad, if picked up by mistake. The cutaneous follicles are more local- ised in the land Salamander, and their secretion is whitish and opake, of an acrid nature, and poured out abundantly when the animal is alarmed or irritated. The cutaneous follicles are nu- merous and close-set in the American Newts of the genera Amhij&toma and Plethodon, in which they exude a milky fluid.' Special aggregates of cutane- ous follicles occur in most Batrachia. In the land Sala- mander they form a porous tubercle behind each eye. In many Anoura the homologous glandular tubercles (' parotoids ' of Giinther') are conspiciious above the tympanum {Ah/tidm, BufonidcB) : they are enormous in Btifo aqua, and arc situated on each side of the neck in UperoUidw. In Bufo calamitu, besides the ordinary parotoids, there is a similar glandular tubercle on the upper side of the legs. The skin of the l.)ack in Kalojdirjpius is thick and glandular, like a parotoid. In Jli/larana the skin has two glandular folds, one on each side of the back, usually of a white colour. Platijmantis ph'cifera has several pairs of such longitudinal folds or ridges.'" In Foh/pcdafes. Scctfiin of tcf^umcnt and cutaneous glands of the Frog, magnJlied. ccxcv. ' XX. vol. iii. p. 277, prep. no. 210
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Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
