14 Mr. Holberton's and Mr. Yarrell's 



attack ; I would reply, that it performed the feat with wonderful prompt- 

 ness and dexterity, not at all in a manner to be expected from a novice. 

 In short, there can scarcely be a doubt that the means employed were 

 those to which it was impelled by its natural instinct. 



Art. V. Notes on the internal appearance of several 

 Animals examined after Death, in the Collection of the 

 Zoological Society. By T. H. Holbkrton, Esq., M.R.CS.y 

 Sfc., «nrf William Yarbkll, Esq., F.L.S.^ F.Z.S.,^c. 



[Continued from Vol. IV, page 322.] 



Active Gibbon. Ilylobates agilis, F. Cuv. 



The skeleton presented seven true, and six false ribs on each side, 

 the last three floating. The upper and lower extremities incapable of 

 the same degree of extension as in man, either at the elbows or knees, 

 owing to strong fascial expansions of the flexor tendons passing in front 

 of the elbow, and behind the knee joints, to be attached to the upper 

 halves of the respective bones below these parts. 



The stomach was placed more longitudinally than in the human sub- 

 ject, particularly from the cardiac orifice, the first two-thirds passing 

 straight down the left side ; the other third portion crossed directly over 

 to the right, terminating in the duodenum, which soon passed again to- 

 wards the spine, (not being placed so far to the right as in the human 

 subject,) and enclosed the head of the pancreas. The coats of the sto- 

 mach were remarkably and uniformly thick ; the great omentum quite 

 devoid of fat ; no valvulce conniventes, nor appendices epiploicce. The 

 large intestines were thrown into folds by three longitudinal bands, as in 

 the human subject. A long glandular body of 2 inches and I in length 

 and nearly ^ of an inch wide, placed in the folds of the mesentery, ap- 

 peared to perform the office of the mesenteric glands. The attachments 



