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Show 1901.] LARYNX OP CERTAIN WHALES. 299 M A C A L I S T E R . - " O n some Points in the Anatomy of Globiocephalus svmeval." Proc. Zool. Soc. 1867, p. 477. P E R R I N . - " Notes on the Anatomy of Balcenoptera rostrata.,'> Proc. Zool. Soc. 1870, p. 805. T U R N E R . - " Anatomy of Mesoplodon bidens." Journ. Anat. & Physiol, xx. 1886. EXPLANATION OF THE PLATES. The letters used have the following significance; in the case of muscles, the letters refer both to tbe muscles and their attachments. A. Arytenoid cartilage. n. Transverse and circular a. Upper plate of epiglottis. muscles of the sublaryn- A.ep. Aryteno-epiglottid muscle. geal pouch. A.ep.f. Aryteno-epiglottid fold. 0. Glottis : entrance to larynx A.p?n. Processus muscularis, or from sublaryngeal pouch. base of arytenoid cartilage. (P. (Esophagus. Ar. Arytenoid body. p. Processus vocalis of aryte- A.w. Supra-arytenoid region of noid cartilage. arytenoid cartilage. Pal. Palate. b. Lower half of epiglottis. Ph. Pharynx. C. Cricoid cartilage. Ph.fl. Floor of pharynx. Car. (Posterior) crico-arytenoid Ph.rnus. Muscular wall of pharynx. muscle. P.M. Posterior nares. C.ar.l. Lateral crico-arytenoid r. Accessory crico-tbyroid muscle. muscle (Balcenoptera). C.c. Ventro-posterior cornu of r. Ridge on cricoid cartilage cricoid cartilage. (Cogia). C.t. Crico-tbyroid muscle. S.ep. Subepiglottid cartilage. E. Epiglottid cartilage. S.l.p. Sublaryngeal pouch. Ep. Epiglottis. S.t. Sterno-tbyroid muscle. Ep.c. Cushion or ridge of epi- T. Thyroid cartilage. glottis or its cartilage. T* . Posterior cornu of thyroid /. Fossa; on external face of cartilage. arytenoid cartilage. T.ar. Tbyro-arytenoid muscle. fa. Articular facet for arytenoid T.c. Tbyro-cricoid muscle in cartilage. Balcenoptera. f.c. Articular facet for cricoid T.ep. Thyro-epiglottid muscle. cartilage. T.h. Tbyro-byoid muscle. f.t. Articular facet for posterior tr. Trachea, or tracheal rings. cornu of thyroid cartilage. T.t. Tubercle or ridge on the gr. Groove in epiglottid cartilage. anterior margin (=ante- H.ep. Hyo-epiglottid muscle. rior cornu) of thyroid. Lar. lnter-arytenoid muscle. W. Tendon, passing from body L. Cavity of larynx. to posterior cornu of thy-m. Median dorsal prominence roid (in Cogia). of cricoid (Cogia). x. Muscle of uncertain homo-mus. p. Muscular wall of sublaryn- logy. Eig. Fig. 1 a PLATE XXV. 1. Balcenoptera. Ventral view of entire larynx, as seen after the removal of the hyoid and the wall of the pharynx. Some of the muscles have been removed from the right side of the figure, so as to show the shape and relations of the cartilages. The right longitudinal muscle (thyro-cricoid) of the sublaryngeal pouch has been cut away so as to exhibit the deeper circular muscles (M.). The median region of the above figure, after the removal of the whole of tbe thryo-cricoid muscle, showing now the outline of the sublaryngeal pouch. The area of attachment of the longitudinal muscle is indicated by the dotted lines. |
