2 THE GUSTATORY ORGANS, BY TH. W. ENGELMANN. 



Cat, Ox, Sheep, Roedeer, Horse, Pig, Hare, Rabbit, Guineapig, Rat, 

 and Mouse. 



The gustatory bulbs (fig. 269) occupy cavities in the lingual 

 mucous membrane, which they completely fill. As a general 

 rule, the form of the spaces is that of a round- bellied flask 

 (Bulb). The bottom of the flask rests upon the surface of the 

 fibrous layer of the membrana mucosa ; the slender and for the 

 most part short neck of the flask perforates the corneal lamina 

 of the epithelium, and opens on the surface with a circular 

 opening, which may be termed the gustatory pore. The length 



Fig. 269. 



Fig. 269. Gustatory bulbs from the lateral gustatory organ of the 

 Rabbit. Magnified 450 diameters. 



of the bulb, which constantly exceeds its greatest breadth, 

 amounts in Man to 0'077 O'OSl of a millimeter ; the greatest 

 breadth is about 0'039G of a millimeter ; the width of the gus- 

 tatory pore is from 0'0027 to 0'0045 of a millimeter (Schwalbe). 



The gustatory bulbs present somewhat diverse forms in different 

 animals. In some, as the Ox and Pig, they are slender and quite 

 three times as long as broad ; whilst in others, as in the Rabbit and 

 Roedeer, they are compressed and but little longer than broad. The 

 most slender are usually the largest. Their size likewise varies, and 

 is not constant in the same species or even in the same individual. 

 In many instances larger and smaller bulbs are arranged in juxta- 

 position, apparently without any regularity. Subjoined are a few 

 measurements taken for the most part from Schwalbe : 



