250 



PRACTICAL HISTOLOGY. 



[XXI. 



(2.) The gustatory cells consist of 



FIG. 240. Papillae Foliatae in the Rabbit. I, I. Pri- 

 mary and secondary septa ; g. Taste-buds ; n. 

 Medullated nerve ; d. Serous gland ; a. Its duct ; 

 M. Muscular fibres, x 80. 



nerves in the papillae foliatse, 



see 



narrow fusiform nucleated 

 cells, whose lower pointed 

 end is continuous with a 

 branch of the axial cylinder 

 of a nerve-fibre, while the 

 free end is continued into a 

 line point or ciliuin, which 

 projects through the gus- 

 tatory pore. 



If it be desired to study 

 the mode of termination 

 of the nerves in these 

 organs, use the lemon-juice 

 gold chloride method, with 

 subsequent exposure of 

 the tissue to sunlight in 

 water acidulated with 

 acetic acid, Golgi's rapid 

 hardening method, or 

 mcthylene-blue. For an 

 elaborate research, with 

 beautiful plates showing 

 the terminations of the 

 Drasch. 1 



SOFT PALATE. 



1. T.S. Soft Palate. Harden the soft palate of a rabbit or dog 

 in Miiller's fluid, alcohol, or corrosive sublimate. Make transverse 

 sections by freezing, or stain in bulk in borax-carmine and cut in 

 paraffin. 



(a.) (L and H) One of the most beautiful methods of staining 

 is that recommended by List, viz., to stain with aniline-green and 

 eosin, and mount in balsam. Even with the naked eye the thick 

 layer of mucous glands can be seen. 



(b.) The stratified epithelium and connective tissue are rosy-red, 

 the nuclei blue. The glands are bluish, and are seen to be mucous 

 in character, lined by a single layer of mucous cells without demi- 

 lunes. In the borax-carmine section, the cells lining the acini of 

 the glands are clear and transparent and show no demilunes, a 

 typical example of a pure mucous gland. 



" Ilnters. iiber d. Paj>. fol. et circurnvall. d. Kaninchens," Abhand. d. 

 math. -phys. Classe d. K. Sachs. Gesell. d. Wisaensch. . Bd. xxiv. 



