. A manual of zoology for the use of students : with a general introduction on the principles of zoology . Zoology. ORDERS OF AMPHIBIA. 409 being now placed at the head of the Fishes, under the name of Dipnoi. Whilst there is a general agreement as to the number and characters of the Amphibian orders, the names employed to designate them are very various, and it really matters little which are adopted. Order I. Ophiomorpha, Owen (= Gymnophiona, Huxley; Apoda of older writers; Ophidobairachia).—This is a small order, including only certain snake-like, vermiform animals, which are found in vario
. A manual of zoology for the use of students : with a general introduction on the principles of zoology . Zoology. ORDERS OF AMPHIBIA. 409 being now placed at the head of the Fishes, under the name of Dipnoi. Whilst there is a general agreement as to the number and characters of the Amphibian orders, the names employed to designate them are very various, and it really matters little which are adopted. Order I. Ophiomorpha, Owen (= Gymnophiona, Huxley; Apoda of older writers; Ophidobairachia).—This is a small order, including only certain snake-like, vermiform animals, which are found in various tropical countries, burrowing in marshy ground, something like gigantic earthworms. They form the family CiEciliadce (so called by Linnaeus from their supposed blind- ness), and are characterised by their snake-Hke form, and by having the anus placed almost at the extremity of the body. The skin is quite soft, but differs from that of the typical Amphibians in mostly having small horny scales embedded in it. Another fish-like character is that the vertebrae are amphi- coelous or biconcave, and the cavities formed by their apposi- tion are filled with the cartilaginous or gelatinous remains of the notochord. The body is cyUndrical and worm-like, and is completely destitute of limbs. The skin is glandular, naked, and viscous, thrown into numerous folds, and containing nu-. Kig. 155. —Ophiomorpha. a Sipkotwps ann-ulaius, one of the CceciUans, much reduced i Head ; c Mouth, shoeing the tongue, teeth, and internal openings of the nostrils; d Tail and cloacal aperture. (After Dumeril and Bibron.) merous delicate, rounded, homy scales, which are dfermal in their character, and are wanting in Siphonops annulatus. The mandibular rami are short, and are united in front by a sym- The teeth are long, sharp, and generally recurved j. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and app
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