SALIVARY GLANDS IN THE PIG. 163 



smell than the pig witness its power of detecting truffles 

 buried in the earth. 



Tongue. The tongue in the pig is much elongated. It is free 

 in its anterior larger half. Its surface is very smooth the nu- 

 merous filiform papillae which cover it being extremely small. 

 There are, besides, found lenticular papillae of small size occur- 

 ring here and there, which posteriorly become larger and more 

 closely set together. Far behind there are two large cup- 

 shaped papillae which are rough on their surface, with a multi- 

 tude of extremely small eminences. The middle of the hyoid 

 bone, or bone of the tongue, is of a square form, much broader 

 on one side than on the opposite, united firmly with the 

 cornua. The cornua, of small length but broad, are cartilagin- 

 ous in a great part of their extent behind. Anteriorly, the 

 hyoid supports two other cornua much smaller, broad, a little 

 raised, and inclined forward. These cornua have a long fibrous 

 ligament which joins them loosely to a second structure 

 namely, that which is contiguous to the styloid bone, and 

 may well be regarded as an integral part of that bone. 



Salivary Glands. The parotid gland, of a crescentic figure, 

 is very much larger proportionately than in the ox, the sheep, 

 and the horse. It is perhaps even proportionately greater 

 than in any other animal, since in adult pigs it weighs as 

 much as three ounces. The duct of the parotid arises at the 

 inferior extremity of the gland ; it is covered in its passage 

 by the masseter muscle and the lower jaw-bone. 



The submaxillary gland in the pig is of an elongated trian- 

 gular form ; it is situated immediately below and within the 

 parotid. These two glands differ from each other both in 

 colour and consistence. The lobes of the submaxillary are 

 comparatively much larger. This gland is much firmer and 

 whiter than the parotid, which is of soft consistence and of 

 a reddish colour. Besides these differences the lobes of the 



