. Ein Handbuch der Zoologie für den Einsatz von Studenten: Mit einer allgemeinen Einführung in die Grundlagen der Zoologie. Zoologie. 550 Handbuch der Zoologie. in der Form. Der Kopf ist nicht so unverhältnismäßig groß wie in den alten Familien, die in der Regel über ein Siebtel der gesamten Länge des Körpers bilden. Abb. 214.- Die gemeinsame Dolphin {Delpkinus delphis). Die auffälligste Mitglieder dieser Familie sind die tnie Delfine, Tümmler und Narwalen. Die Delphine haben eine längliche Schnauze, von tlie Kopf Durch eine querliegende Depressionen getrennt. Der Gemeine Delfin (Del-phinus Delphis^, Abb. 214) ist der beste -

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. A manual of zoology for the use of students : with a general introduction on the principles of zoology . Zoology. 550 MANUAL OF ZOOLOGY. in shape. The head is by no means so disproportionately large as in the former families, usually forming about one-seventh of the entire length of the body.. Fig. 214.—The common Dolphin {Delpkinus delphis). The most noticeable members of this family are the tnie Dolphins, the Porpoises, and the Narwhal. The Dolphins have an elongated snout, separated from tlie head by a transverse depression. The common Dolphin (Del- phinus delphis^, fig. 214) is the best-known species. It aver- ages from six to eight feet in length, and has the habit of swim- ming in flocks, often tecompanying ships for many miles. The female, like most of the Cetacea, is uniparous. The Dolphin occurs commonly in all European seas, and is especially abun- dant in the Mediterranean. The common Porpoise {Phoccma communis) is the commonest and smallest of all the Cetacea, rarely exceeding four feet in length. The head is blunt, and is not produced into a pro- jecting muzzle. The Porpoise frequents the North Sea, and is commonly seen off our coasts. Another British species is the Grampus {Phoccena orca), but this is much larger, attaining a length of from eighteen to twenty feet. Nearly allied to the Grampus is the so-called " Caing" Whale, or, as it is some- times termed, the " Bottl'e-nosed" Whale {Globicephalus or Phoccena globiceps). This species occurs not uncommonly round the Orkney and Shetland Islands, and attains a length of as much as twenty-four feet. It is gregarious in its habits, and is often killed for the sake of its oil. Closely alUed to the true Dolphins are two curious Cetaceans, belonging to different genera, but both inhabiting fresh waters. One of these is the Gangetic Dolphin (Platanista Gangetica), which inhabits the Ganges, especially near its mouth. This singular animal is characterised by the great length of its slen

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• bookauthorni
• bookcentury1800
• bookdecade1870
• booksubjectzoology