No. I.] OBSERVATIONS ON THE GUSTATORY ORGANS. ^j 



The Tongue of Viverra civetta. 



Gejieral Description. — The organ measures "jZ mm. in length, 

 21 mm. in breadth, and is free from the fraenum for 20 mm. 

 Anteriorly it is bordered by a fringe of delicate filiform papillae. 

 The tip is slightly bifurcate, and the under surface is impressed 

 by a deep median groove extending from the fraenum to the tip. 

 Papillae of the fungiform type are not numerous. The circum- 

 vallate papillae are very indistinct, but there appear to be at 

 least three (.■'), arranged in a triangle, the apex being turned 

 backwards. The microscopical examination of the papillae 

 yielded only negative results. 



The Tongue of Canis cinereo-argentatiis. 



General Description. — The organ neasures 63 mm. in length, 

 17 mm. in width, and is free from the floor of the mouth for 

 24 mm. The tip is obtuse, and the anterior third of the papil- 

 late surface is impressed by a mesial groove. The usual fleshy 

 processes project from the basal region of the tongue. The fun- 

 giform papillae are similar to those in Vulpcs vulgaris, and re- 

 semble minute white beads. The circumvallate papillae, five in 

 number, are arranged in two lines converging posteriorly. Each 

 is encircled by a slightly verrucose, fimbriated wall. The lat- 

 eral organs of taste lie at the junction of the papillate and 

 non-papillate surfaces, and are not concealed by a fringe of 

 papillae as in V. vulgaris. 



gustatory structures. 



Tlie Circumvallate Papill(E. — The papillae are slightly verru- 

 cose at the summit, and the adjacent surface is papillate. They 

 measure 0.85 mm. transversely and 0.70 mm. in height. The 

 trenches are not very narrow, and the ducts of the serous glands 

 open into them at their deeper part. The glands themselves are 

 not very plentiful. The bulbs are disposed in twelve closely set 

 tiers, filling the lower two-thirds of the lateral area. Each tier 

 contains upwards of sixty bulbs. They measure 0.046 mm. in 

 length and 0.024 i^im. in breadth. 



The Lateral Gustatory Organs. — These organs are about 

 5 mm. long and consist of some ten unequal folds, the majority 



