10 SPECIAL HISTOLOGY. 



situated racemose glands, but ends upon and between the 

 latter, uniting with them, or with a dense fibrous tissue between 

 them, by means of tendinous striae. 



The transverse muscle or the transverse fibres of the tongue 

 (transversus linguae sive fibres transver sales, fig. 169, tr., 170, tr. } 

 171, g), consists of very numerous lamellce belonging to each 



half of the tongue, 

 ■which penetrate with 

 great regularity be- 

 tween the transverse 

 lamella of the genio- 

 glossus, and are to be 

 f„t found in all sections 

 of the organ. Each 

 lamella is O'l — 

 0-16'" thick, and in 

 the middle of the 

 tongue %' deep ; it is 

 usually perpendicu- 

 lar, and its muscular fibres extend from the septum lingua to 

 the lateral border of the tongue. They arise, so to say, directly 

 from the whole surface of the septum, by the intermediation 

 of a small quantity of a transverse tendinous tissue, distinct 

 from its longitudinal fibres, and pass, united into small 

 flat bundles, at first, directly outwards. In their further 

 course, they curve upwards, and finally, the uppermost shortest 

 fibres reach the sides of the dorsum of the tongue, the inferior 

 longer ones, its proper lateral margin, where they also become 

 attached to the mucous membrane by means of short bands of 

 connective tissue. The other lingual muscles form, in a man- 

 ner, the sheath of the organ and, in their course, partly follow 

 the above, partly take their own special direction. 



The hyo-glossus (baseo- and cerato-glossus of authors), has, 

 at the sides of the tongue, nearly the same relations as the 



Fig. 170. Transverse section of the human tongue, a little in front of the papilla 

 circumvallatce : g, genio-glossus ; Li, longitudinalis inferior {lingualis) with the 

 arteria ranina ; tr, transversus, visible in its whole extent on the left side, on the 

 right only at the edge and between the divaricating bundles of the genio-glossus ; g' t 

 termination of the genio-glossus upon the mucous membrane ; h', termination of the 

 hyo-glossus ; l.s, longitudinalis superior, with flat bundles interposed between the per- 

 pendicular fibres ; d, glands of the margin of the tongue ; st.gl, stylo-glossus. 



