206 DR. J. ANDERSON ON MACACUS BRUNNEUS. [Feb. 20, 



in. lin. 



Breadth of ascending ramus 11 



Breadth under first malar 7| 



Antero-posterior length of symphysis 10| 



With regard to the teeth, both molars of the upper jaw have each 

 four cusps, and the first deciduous tooth is considerably smaller than 

 the second and first permanent molar. In the lower jaw, the first 

 temporary molar is not so markedly quadricuspidate as the corre- 

 sponding tooth of the upper jaw, and is much narrower than the tooth 

 behind it, which has four cusps. The upper temporary canine has 

 a pyramidal crown internally flattened and externally convex; and in 

 the lower jaw this tooth has a prominent projection on the posterior 

 margin of the base of the crown. The first permanent molar in the 

 upper jaw has four cusps ; but in the lower jaw there is a rudimentary 

 cusp on the posterior margin between the two hinder cusps. In the 

 upper jaw the first permanent incisor is the first tooth to appear, and 

 is followed by the first bicuspid. After these teeth are through the 

 gum they would appear to be followed first by the second molar, 

 then by the second bicuspid, and lastly by the canine. 



The tongue is oblong, and of nearly equal width throughout. There 

 are only five circumvallate papillae. On the border of the tongue, 

 external to these papillae, there are twelve short vertical slits, the ex- 

 ternal orifices of as many crypts, each of which is separated from its 

 fellow by a very narrow septum, bearing on each of its sides a more 

 or less triangular papillary-looking body, a considerable portion of 

 which is in the crypt ; but it also appears externally, and with its 

 fellow of the opposite side almost invests the outer wall of the par- 

 tition between the two crypts. The most anterior crypt is very shallow, 

 and has a papilla only on its anterior wall. The two posterior crypts 

 are also very shallow, but they each bear two papillae. The papillae 

 are broadest below and narrow above, attached to the sides of the 

 septa, but springing, by the apex of the triangle, from the sides of 

 the upper walls of the crypts. These structures, crypts, and papillae 

 are in a straight line extending over 5 lines. From their position on 

 the sides of the tongue immediately external to the orifices of the 

 buccal pouches, they appear to be specially related to these structures, 

 and have probably a twofold function — the papillae being gustatory, 

 and the crypts the orifices of numerous glands for the lubrication of 

 the cheek-pouches, while the papillae doubtless determine whether 

 the food that may have long lain in the buccal sacs or been stored 

 there in haste is fit to be swallowed. 



The stomach consists of two portions : — first, a rounded sac which 

 forms the bulk of the organ ; and, second, a tubular portion continued 

 on from it to the pylorus, and measuring about 1" 3'" in length and 

 9'" in breadth. The latter portion describes a well-marked upward 

 curve to the pylorus ; and its rather strong internal, muscular coat is 

 prolonged on to near the external margin of the cardiac projection of 

 the globe of the stomach, where it is met by the muscular layer from 

 the left side of the oesophagus, and by muscular fibres which pass 



