On the gustatory organs of Sciurus carolinensis / Frederick Tuckerman.

  • Tuckerman, Frederick, 1857-
Date:
1889
Catalogue details

Licence: Public Domain Mark

Credit: On the gustatory organs of Sciurus carolinensis / 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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    The ICROSCOPE. Published on the 10th of EACgi Month, At 2S Washington Avenue, Detroit;'Mich. publication; books for review and exchanges should be addressed to 3E Microscope, 25 Washington Ave., Detroit, Mich. All articles for the Editors of The Subscriptions, Advertisements^and. a$ Hf*inBgB,'matters, are attended to by The Microscope Publishing Co., 25 Washingtoa.AvenTie, Detroit, Mich. All remittances promptly acknowledged. To insure answer, letters of inquiry, not intended for publication, must inclose a two cent stamp. Authors of papers will be supplied with 25 reprints free, when the desire for such is stated on the manuscript. , Specimens for examination should be sent to the Microscope Laboratory, 25 Washington Avenue, Detroit, Michigan. In all cases the transportation charges on these specimens must be prepaid. Vol. IX. DETROIT, JULY, 1889. No. 7. ORIGINAL COMMUNICATIONS. ON THE GUSTATORY ORGANS OF SCIURUS CARO- LINENSIS. [plate VII.] FREDERICK TUCKERMAN. FN the tongue of most Rodentia the posterior portion rises some- what abruptly above the level of the anterior. The tongue of S. carolinensis possesses this characteristic, although not especially well marked. The organ is 40mm. in length, 10mm. in breadth, and 8mm. in thickness, and is perfectly free for 17mm. from the fraenum. The papillate surface is usually marked by a superficial longitudinal groove extending along the anterior half to the tip. In some specimens the groove passes directly through the apex, and from thence is continued to the fraenum. The dorsum, anterior to the area of the circumvallate papillae, is thickly beset with small, recurved papilla of mechanical function. These papillae vary in form, some being cone and others more or less cylinder-shaped. The latter measure 0.40mm. in height and 0.14mm. in breadth at their widest part, and, in the mid-dorsal region of the tongue, are about 0.35mm. apart. They are more or less flattened on top, with perpendicular sides, and each is seated upon one or more papillary upgrowths of the mucosa. The epithelium covering the papillfe is somewhat imbricated, and the spaces between them are filled to some height with epithelium likewise imbricated in arrangement. Not infrequently the papillae have one or more cornified spines projecting from their upper surface, the points of which are directed inwards