XIII 



PHYLUM CHORDATA 



325 



the right of the partition arises the pulmonary artery; from the 

 part to the left are given off the right and left aortic arches. 

 When the two auricles contract, the blood from the right 



1. an, 



-I c 



FIG. 968. Lacerta viridis. Dissection from the ventral aspect showing the alimentary;, 

 circulatory, respiratory and uriiiogenital organs (nat. size). The liver (Ir.) is divided longi- 

 tudinally and its two halves displaced outwards ; the alimentary canal is drawn out to the 

 animal's left ; the cloaca with the urinary bladder and posterior ends of the vasa deferentia 

 is removed, as also is the right adipose body. a. co. anterior cornu of hyo d ; az. azygos or 

 cardinal vein ; b. hy. body of hyoid ; c. caudal vein ; c. ad. adipose body ; c. m. creliaco- 

 mesenteric artery ; cce. caecum ; cr. carotid artery ; d. ao. dorsal aorta ; du. duodenum ; e. ju. 

 external jugular vein ; ep. epididymis ; epg. epigastric vein ; /. a. femoral artery ; f. v. femoral 

 vein; g. b. gall-bladder; i.jv. internal jugular vein; U. ileum ; i. m. inferior mesenteric 

 arteries; /(.-.kidney; I. ao. left aortic arch ; I. au. left auricle ; Ig. lungs ; Ir. liver ; m. co. 

 middle cornu of hyoid : p. a. pulmonary artery ; pc. pericardium ; p. co. posterior cornu of 

 hyoid ; pn. pancreas ; pi. pelvic vein ; pt. c. postcaval vein ; pt. v. poital vein ; p. v. pulmonary 

 vein ; r. rectum ; r. au. right auricle ; r. It. a. right hepatic artery ; sc. sciatic vein ; sd. a. 

 subclaviau artery ; scl. r. subclavian vein ; spl. spleen ; st. stomach ; s. v. sinus venosi s ; 

 th. thyroid gland ; tr. trachea ; ts. testis ; v. ventricle. (From Parker's Zootomy.) 



VOL. II X 



