. Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880. Natural history; Indians of North America -- Craniology. 14 MINOT ON THE TONGUE. portions and enters the tip. The upper surface of the tip has a deep frontal fissure, and is thrown into fine transverse folds, behind which is a broad flattened median dorsal ridge ; fig. 2, a, narrow posteriorly but widening frontwards. Duvernoy (V, p. 11), considered this ridge {dm. his figure H) to be the posterior extension of the glandular portion, but in G.
. Anniversary memoirs of the Boston society of natural history ; pub. in celebration of the fiftieth anniversary of the Society's foundation. 1830-1880. Natural history; Indians of North America -- Craniology. 14 MINOT ON THE TONGUE. portions and enters the tip. The upper surface of the tip has a deep frontal fissure, and is thrown into fine transverse folds, behind which is a broad flattened median dorsal ridge ; fig. 2, a, narrow posteriorly but widening frontwards. Duvernoy (V, p. 11), considered this ridge {dm. his figure H) to be the posterior extension of the glandular portion, but in G. dilepis it is entirely muscular. A transverse section, through the line 2, of fig. 2*, is represented in the accompanying cut o. The whole upper half is strongly pigmented. The extension H, of the hyoid occupies the centre of the lower part of the section; its structure is noteworthy. Its core is composed of loose parenchymatous tissue, somewhat resembling that of the vertebrate chorda dorsalis, in that it consists of thick walled cells, having only a very loose sarcodic network, and a protoplasma " Sof" around the nucleus. A similar tissue fills, as will presently be described, the hyoid bones and cartilages of the mocking bird (llimus liohjgloUus). The ques- tion therefore arises, whether this form of the medulla ossi'um is general among the Sauropsida. Around the pai'enchymatous core is a sheath of circular fibres or perhaps elongated cells. Outside of this follows a layer of longitudinal fibres, which from their distinctness and considerable diameter, I at first thouy-ht miffht be muscular, but I could not observe any striae, or indications of fibrillar structure, so that I am uncer- tain as to their nature. Entirely surrounding this layer is a thick fibrillar sheath. The extension of the hyoid therefore consists of four parts. It lies in a distinct space, apparently, though perhaps not really, a cavity, which is limited by a fibrous wall, that gives rise to two
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