On the gustatory organs of some Edentata / by Frederick Tuckerman.

  • Tuckerman, Frederick, 1857-
Date:
1890
Catalogue details

Licence: Public Domain Mark

Credit: On the gustatory organs of some Edentata / by Frederick Tuckerman. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    shaped canity or recess, 0,B5 mm. in depth and ] mm in diametei The walls i»l bhe recess are not very thick, and art; lined with stra- tified epithelium, resembling in the main that of the adjacent lingual surface. From the floor of the recess rise two ridges, which largely fill it. The larger of the two measures 0,40 mm. in diameter and 0,45 mm. in height. Serous glands are fairly abundant, and their ducts open into the spaces between the ridges, and also at the sides of the recess towards its deeper part. The ridges bear bulbs over their entire circumference. Bulbs are also very irregularly scattered in the walls of the cavity, and likewise occur in clusters near its mouth. They are small, measuring 0,o42 mm in length and 0>024 mm. in breadth. The fungiform papillae appeared to be of the usual mam- malian type, but were destitute of bulbs. The latter were likewi-(- Avanting in the epiglottis. The Tongue of Dasypus minutus. This specimen had been kept in spirit/, but was not in a favou- rable condition for minute examination. General Description. — The organ is 33 mm. in length, 5,5 mm. in breadth, and is free from the fraenum for 14 mm. The under sur- face has the usual ridge, the upper anterior region being grooved transversely. The tip was somewhat less pointed than in the other Edentata examined. Although the entire tongue was cut into sections, no circumvallate papillae or lateral gustatory organs were found. It is quite probably, however, that they were overlooked. The fungiform papillae were of good size, and contained bulbs. In a single section of one of them I counted no less than six. They measured on the average 0,039 mm. in length and <>,<>21 mm. in breadth. Simple and compound filiform papillae were numerous, the former being interspersed among the latter. The epiglottis was not examined. The Tongue of Chlamyphorus truncatus. I received only the anterior four-fifths of this tongue. The piece measured 36 mm. in length. It had been kept in spirits, and was suf- ficiently firm for cutting.