THE VAGUS NERVE. 391 



if the nerve trunk be pulled, the fan-like expansion of the nerve on 

 the ventral side of the stomach may be seen. 



1041. N. gastricus dorsalis (Fig. 103, 107). Now follow the 

 dorsal division of the vagus. It winds around to the dorsal side of 

 the oesophagus, and when within about 2 cm. of the diaphragm, a 

 large branch may be seen to join it. This is the dorsal division of 

 the right vagus. Follow the combined trunk to the diaphragm, 

 then cut the diaphragm so as to expose the oesophagus ; do this 

 carefully, so as not to injure the nerve. Now pull upon the dorsal 

 gastric nerve, and its fan-like expansion on the great curvature of 

 the stomach will be seen, and also a tense line passing dorso-caudad 

 to the semilunar ganglion of the solar plexus (Fig. 107, Ramus 

 cm., Gng. smln.). The left semilunar ganglion is at the left of the 

 A. mesenlerica superior. It is a pinkish white body not difficult 

 to distinguish. 



Preparation of Fig. 107. The arteries and veins were injected from the abdominal 

 aorta and postcava ( 363, 365) ; the skin was then removed as shown in the figure, and 

 the ribs cut within 2-3 cm. of their heads ; the costi cartilages were cut at about the same 

 distance from the sternum, and then the thoracic and abdominal walls were removed. 

 The arm was amputated near the middle of the brachium * the sterna- and daw-masioid 

 muscles were also removed. The sternum and heart were turned to the right, together with 

 the brachio -cephalic, vein. The left lung was cut off at its root and removed. The vessels 

 and nerves were then isolated as directed above ( 1008). 



Explanation of Fig. 107. In the description of this figure, under the general heads, 

 which are arranged alphabetically, the special parts are named commencing at the caudal 

 extremity. 



A. c., A. cceliaca ( 966). A. m. s., A. mesenterica superior (967). A. oes., A. 

 oesophagea One of the O3sophageal arteries. Aorta ( 965). A. V. cost., A. V. cos- 

 tales The intercostal arteries and veins (Fig. 103). A. brcph., A. brachio-cephalica 

 (Fig. 101, 102, 103). A. s., A. subclavia ( 933). A. axillaris (Fig. 105, 938). A. 

 sternalis ( 935). A. carotidea The left carotid artery ; the name is written on the 

 trachea just mesad of the artery (Fig. 101, 927). A. thyr., Axis thyroideus ( 937). 

 A. 1., A. lingualis The lingual artery, a branch of the carotid. A. fac., A. facialis 

 The facial artery, a branch of the carotid (Fig. 87). Adrn., Corpus adrenale The adre- 

 nal or suprarenal body ( 760). Cardia Heart ( 822). Costae (13) Ribs. Costa ster- 

 nales (9). Dphrg., Diaphragma, (Fig. 90, 815). D. Stenon., Ductus Stenonia- 

 nus Duct of the parotid gland (Fig. 87, 780). Gng. smnl., Ganglion semilunare 

 The semilunar ganglion, the largest ganglion of the solar plexus ( 1044). Gng. vert., 

 Ganglion vertebrale The caudal cervical ganglion of the sympathic, ( 1042). Gng. 

 thyr., Ganglion thyroideum The thyroid or middle cervical sympathic ganglion 

 ( 1043). Gng. crv. sym., Ganglion cervicale superius sympathici The superior 

 cervical ganglion of the sympathic ( 1043). Gng. inf. (vagus), Ganglion inferius vagi 

 The inferior ganglion of the vagus, called also the ganglion of the trunk. Gl. (Glan- 

 dula) parotis The parotid gland (Fig. 87, 773, 779). Humerus (Fig. 46, 407). M. 

 serratus mg. (magnus), (Fig. 73, 664). M. teres (Fig, 75, 680). M. latis., M. latis- 



