194 FALCO TINNUNCULUS. 



]ar to the gape-line. The cere is short, its margin 

 forming- a convex curve before the nostril, below which 

 it is concave, and slopes towards the angle of the mouth. 

 The lower mandible has the angle very broad and 

 short, the dorsal line convex, the back broad and 

 rounded, the sides convex, the sharp edges inflected, 

 the tip almost directly truncate, with a semicircular 

 notch on each side behind it. 



The upper mandible within has a very prominent 

 central ridge ; the lower, which is deeply concave, a 

 smaller elevated central line. On the palate are two 

 prominent longitudinal lines, having on their ridge mi- 

 nute papillae directed backwards, and two smaller di- 

 verging lateral lines. The palatal slit is narrow-oblong 

 behind, linear before, laterally and posteriorly with four 

 flat lobes fringed with acicular papillse. The tongue is 

 short, fleshy, posteriorly sagittate and papillate, round- 

 ed and emarginate at the end, channelled above, its 

 lower free surface horny and with a central groove. 

 The oesophagus, which is four inches and a-half in 

 length, is a little dilated about the middle, where it lies 

 rather to the right of the trachea, and has the walls of 

 its lower part thickened and studded with cylindrical 

 glandules. This part, the proventriculus, opens with a 

 wide aperture into the stomach, which is of a roundish 

 rather flattened form, when distended two inches in 

 diameter ; the muscular coat thin, with the two lateral 

 tendons small but distinct, and about half an inch in 

 diameter ; the middle coat thin and tough^ the inner 

 soft and easily separated. The pylorus is very narrow, 

 with three soft valvular prominences. The intestine, 

 for about eight inches, is nearly of uniform diameter, 



