. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Hyoid bones of the Piked Whale. transversely, and is slightly curved backwards and upwards; its middle portion supports an- teriorly two processes (b, b) resembling the base of the anterior cornua in the Ruminants ; besides these there are, in this genus, two rounded tubercles on the posterior margin op- posite these processes. The styloid bones (c, c) are cylindrical and slightly curved in two directions ; they are joined by cartilage on each side to the occipital protuberance which represents the mastoid process. The m
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Hyoid bones of the Piked Whale. transversely, and is slightly curved backwards and upwards; its middle portion supports an- teriorly two processes (b, b) resembling the base of the anterior cornua in the Ruminants ; besides these there are, in this genus, two rounded tubercles on the posterior margin op- posite these processes. The styloid bones (c, c) are cylindrical and slightly curved in two directions ; they are joined by cartilage on each side to the occipital protuberance which represents the mastoid process. The muscles which protrude and retract the tongue are extremely simplified in the Ce- taceans ; the retractors are represented by a single pair, analogous to the stylo-hyoidei, the fibres of which pass from the posterior margin of the stylo-hyal bones to the body of the hyoid. The stylo-glossi pass from the anterior and superior margin of the styloid process to their insertion. The hyoglossi arise from the middle of the convexity of the os Tongue of the Dugong. In the Porpesse the surface of the tongue is soft and smooth, and very flat superiorly; the anterior margin is fringed by a number of short irregular processes (a, fig. 265). The salivary glands are reduced to the most rudimental condition. In the Phytophagous Cetaceans the stomach is separated into two portions (fig. 261); one, the cardiac (a), very large, the other, the pyloric (6), of narrower calibre, by a contrac- tion (c) giving origin to two prolongations (d, d), which are tubiform in the Dugongs, and of a pouch-like form in the Manatees. In both species there is a gland at the cardiac extremity of the stomach (c), which in the Dugong, Sir Everard Home (from whose memoir the figure subjoined is taken) describes as " forming a round mass, as in the Beaver. The orifices of these glands are small, and * From Fr. Cuvier, Cetacea, pi. Please note that these images are extracted from scanned page images
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