478 DR. J. MURIE ON SAIGA TARTARICA. [June 9, 
where. Jn the young female the sac and its opening similarly placed 
(see fig. 8, MS) were smaller than in the adult male; but I shall 
choose the latter for description. It is placed deeply beneath the 
nasal muscles and tissues, above the premaxillary bone, and vertically 
under the alar cartilage. It is globular in shape, an inch deep, and 
with a large vertical ellipsoidal aperture opening into the nasal 
passage below the anterior inferior margin of the alar cartilage. 
Interiorly it is lined with an extension of the mucous membrane, 
and is studded with glands similarly to the hairy portion of the nares. 
The glands secrete abundantly a sebaceous-looking substance which 
Pallas says has a rancid goat-like odour; and in this I concur, 
though in Sheep the smell from the nares is not dissimilar. The 
inferior turbinal bones and mucous lining narrow the nostril behind 
the opening of the sac; but it is worthy of notice that a small ver- 
tically semilunar depression, } an inch long, exists between them 
outside the turbinal and superior to the orifice of the sac. There is 
also another much wider fossa or duplication of membrane on the 
floor of the chamber mesially and in front of the first-mentioned 
premaxillary sac. In fact, a semilunar membranous fold forms a 
well-defined step between the raised anterior narial chamber and 
deeper posterior nares. The soft membranous postseptum is very 
thick compared with the front part; its vessels are arranged in very 
numerous obliquely parallel lines. 
Fig. 8. 

Dissection, head of female Saiga, showing nasal sac and nervous distribution. 
ZS. Maxillary sinus, or extra nasal sac; a portion of its outer wall is removed, 
and an arrow from the nares shows the connexion therewith; parts of two 
other arrows indicate the separate nasal passages. jf. Suborbital fossa or 
pit. Na.m. Nasal muscles, reflected and partially cut off. z. Origin and 
insertion of zygomaticus. J.0.n. Infraorbital nerves. Fx. § a. Facial 
nerve and artery, a dotted line carrying them towards their cranial exit. 
P. gl. Parotid gland; and G/.s. Glandula socia. F.v. Facial vem. ‘Sz. d, 
Stenon’s duct. Ma’ and Ma?. Superficial and deep layers of the masseter. 
Te. Temporalis. 
