No. I.] OBSERVATIONS ON THE GUSTATORY ORGANS. 75 



posing the body of each fold divides into two (more rarely three) 

 fairly symmetrical lamellae, the interspace being filled up to the 

 general level with epithelium. Serous glands are not abundant 

 in this region. Their ducts usually open at the bottom of the 

 furrows. The bulbs are limited to the lower half or two-thirds 

 of the lateral portion of the folds. They are disposed in three 

 or four closely-set tiers, each tier containing about eight bulbs 

 in its entire length. They measure 0.062 mm. in length and 

 0.032 mm. in breadth. 



TJie Fujigiforni Papillce. — These appear to be normal in size, 

 shape, position, and structure. Each papilla, as already pointed 

 out by Loven, bears a single bulb at its upper part, the latter 

 lying vertically, directly in the long axis of the papilla. In 

 point of size they are smaller than those of the circumvallate 

 and foliate papillae. Bulbs are numerous on the posterior sur- 

 face of the larynx. 1 They average only 0.036 mm. in length 

 and 0.027 mm. in breadth. 



The Tongue of Mtis mtiscuhis. 



General Descnption. — The organ is flattened and expanded 

 anteriorly, and raised posteriorly. The two divisions are of 

 about equal length, the total length of the tongue being 13 mm. 

 The free part of the organ is 5 mm. in length, the tip is obtuse, 

 and the upper and lower surfaces are impressed by a median 

 groove. The circumvallate papilla lies in the median line, close 

 to the base of the organ. The trench is normally incomplete 

 anteriorly, and, in some instances, I think, also posteriorly 

 incomplete. 



GUSTATORY STRUCTURES. 



The Circitmvallate Papilla. — The adjacent surface is unpa- 

 pillate. The papilla measures 0.23 mm. transversely, and is 

 0.25 mm. in height. The summit is slightly rounded, overtop- 

 ping the adjacent lingual area, and the walls are perpendicular 

 or nearly so. Serous and mucous glands are only fairly plenti- 

 ful, the ducts of the former opening into the trench at its lower 

 part. The bulbs are closely set, and, in the papilla, are disposed 



^ Where no mention is made of the larynx, it is to be understood that owing to 

 lack of material, no investigation was possible. 



