OCR Text |
Show 1881.] ANATOMY OF THE ERINACEIDSE. 399 and curving forwards, under cover of the mylo-hyoid and genio-hyoglossus muscles, passes along under the mucous membrane of the floor of the mouth, opening at the base of the above-noticed papilla. In the specimen examined there was no trace of sublingual glands. The parotids are larger than the submaxillaries, but very similar to them in structure. The stomach (fig. 2) resembles that of man in general outline; the oesophagus enters it by a narrow orifice far removed from the pylorus. The cardiac portion has the mucous membrane thrown into very deep rugae, which extend from the entrance of the oeso- Liver of Gymnura raffiesii. Liver of Erinaeeus europceus. phagus. The intestinal canal is about six times the length of the head and body, of nearly the same calibre throughout, without caecum, and suspended typically in the mesentery. The liver (fig. 4) is wide and deeply divided into lobes; the spigelian lobe bifid, the caudate very long, divided at its posterioi extremity by the deep renal fossa; umbilical and cystic fissures well marked; the gallbladder large and pyriform, projecting considerably beyond the margin of the right central lobe, on which it is placed. The lungs (fig. 6) are large and deeply divided into lobes, the ri^ht lung into three, the fissures extending to the root of the lung, the left into two nearly equal lobes; the azygos lobe well developed and pyramidal in outline. |