OCR Text |
Show 398 MR. G. E. DOBSON ON THE [Mar. 1, sils consist each of a deep oval depression with raised edges, partly concealed by a membranous fold in front, so that the opening of the depression is directed backwards towards the pharynx. Tongue moderately long and obtusely pointed, soft and flexible, covered all over with fine trifid papillae, each consisting of a long central filiform papilla having a shorter and more slender papilla at either side; Fig. 2. Stomach of Gymnura raffiesii. ... Fig. 3. Stomach of Erinaeeus europaus. fungiform papillae few but conspicuous; circumvallate papillae two only, very large, elongated, in deep oval pits placed obliquely at the back of the tongue; beneath, close to the symphysis menti, at the anterior extremity of the floor of the mouth, are a pair of Ion* pomted papillae, at the bases of which the apertures of the ducts of the submaxillary glands open. The latter are rather small, con- S3S T, 0t Vt™]- aiUeri0r a n d a l a r & e Posterior lobe; the duct, passing between the digastric muscle and the ramus of the mandible |