160 EEEDEEICK TUOKEEMAN. 



the lower half of the outer wall of the trench. In some 

 vertical sections they are arranged along the sides and lower 

 surface in several rows. 



The bulbs are quite irregular in size, and exhibit some 

 variation in shape (fig. 5 shows the structure of the bulbs 

 magnified 240 diameters. Their average length is about 0*06 

 mm.). The neck is very short and narrow, and only in 

 a single bulb did I observe hair-like processes protruding 

 through the pore. The nuclei of the peripheral cells stain 

 quite deeply in hsematoxylin. The outer layer of epithelium, 

 at the point of its perforation by the bulbs, stains a uniform 

 yellow in picro-carmine. I did not succeed in identifying 

 gustatory as distinct from covering cells, though by teasing I 

 was enabled to dislodge several bulbs from their position in the 

 epithelium, and, in one case, to isolate a bulb with a nerve- 

 fibril attached to or entering its base. 



The Fungiform Papillae. — These papillae offer nothing 

 very unusual in their general appearance. In shape they 

 resemble the human type. A variation from the normal, 

 however, is seen in their distribution, they being more nume- 

 rous and larger over the middle of the dorsal surface than 

 elsewhere. 



In a few cases I found isolated taste-bulbs in the epithelium 

 at the upper part of the papilla. The best specimen is repre- 

 sented by fig. 6. This papilla contains two bulbs, but they 

 are neither of them of a high order. They are arranged 

 obliquely near the summit, with their apices directed outwards 

 and upwards, and measure about 0'05 mm. in length, and 

 0'032 mm. in breadth. In none of my sections do they appear 

 to reach the surface of the epithelium. 



Non-medullated nerve-fibres are quite abundant in the upper 

 part of the body of the papilla, and nerve-fibrils can be seen 

 running directly beneath the epithelium containing the taste- 

 bulbs. Beyond this point I was unable to trace them. A few 

 collections of ganglion-like cells are scattered along the course 

 of the nerves. In some of the papillae the nerve-fibres 

 terminate in end-bulbs, as already pointed out by Krause and 



