BUCCAli CAVITY 309 



"b. The upper teeth, comprising the incisors at the 

 front of the palate, and the grinders at the sides 

 opposite the junction of hard and soft palates, 

 have already been described (p. 292). 



€. The naso-palatine canals, which connect the nasal 

 and buccal cavities, open in a pair of grooves 

 running backwards from the small posterior in- 

 cisors, and about an eighth of an inch behind 

 these. 



d. The tonsils are a pair of small pits at the sides of 

 the posterior part of the soft palate, near its 

 hinder border. The outer wall of each is much 

 thickened, forming a papilla which nearly closes 

 the opening. 



2. The floor of the mouth. 



The tongue is an elongated muscular nmss, attached 

 along the greater part of its length to the floor 

 of the mouth, and produced in front into a free 

 flattened tip. 



The surface of its hinder part is hard and 

 slightly elevated; that of the anterior part is 

 softer and dotted over with small white taste 



PiQ. 59. — lepus cuniculus. — Diagrammatie view from the left side. The 

 head and vertebral column are represented in longitudinal section ; 

 the lungs, the left half of the liver, the stomach, the greater part of 

 the intestine, and the brain and spinal cord have been removed, and 

 the loop of the duodenum spread out. (a. m. m.) 



A, tongue. AW, anus. B, bladder. BO, basi-ocoipital, BS, basi- 

 sphenoid. Ci liver. CA, carotid artery. D, diaphragm. DA, aorta. B, 

 duodenum. ET, ethmo-turbinal. BTJ, aperture of Bustachian tube. I*, pan- 

 creas, pi*, floooular fossa. G-, gall-bladder. H, bile-duct. HV, opening of 

 ■hepatic vein into posterior vena cava. IV, posterior vena cava. J, organ of 

 Jacobson. JV, left external jugular vein. K, kidney, turned up. L, larynx, 

 Taisected. LA, left auricle. IiG, sublingual gland. LV, left ventricle. L 7, 

 seventh lumbar vertebra. M, manubrium stemi, with the sternal portion of the 

 first rib. MA, anterior mesenteric artery. MG-, subraaxillary gland. MT, 

 maxillo-turbinal. K", posterior nasal chamber. O, optic foramen. P, hard palate. 

 PA, spermatic artery. PD, pancreatic duct. PQ-, perinaeal gland. PIT, 

 penis. PS, pre-sphenoid. PV, portal vein, Q, oesophagus. R, hinder part 

 of the rectum. E.G, rectal gland. S, uterus mascuUnus. S A, left subclavian 

 artery. SB, suprarenal body, displaced. SV, left anterior vena cava. TN", 

 (right tonsil. TR, trachea. T 1, first thoracic vertebra. T 12, twelfth 

 thoracic vertebra. XT, ureter. V, testis. "W, epididymis. X, vas deferens, 

 y, prostate. Z, pelvic symphysis. 



