THE FROG. 



n.sp. Spinal nerves. 



n.sy. Sympathetic nerves. 



ce. CEsophagus. 



p. Pancreas. 



pc. Cut edge of pericardium. 



p.m. Pulmo cutaneous artery. 



pr.c. Vena cava superior (precaval vein). 



pt. Peritoneum. 



pt.c. Vena cava inferior (postcaval vein). 



r. Kectum. 



s. Sternum. 



x.iiit. Small intestine. 



s.sc. Supra scapula. 



sk. Skull. 



sp. Spleen. 



st. Stomach. 



t. Tongue. 



th. Thyroid gland. 



tin. Thymus gland. 



ts. Testis. 



u.bl. So-called urinary bladder. 



u.bl'. Orifice of the same. 



ur. Genito-urinary duct <J. 



ur'. Orifice of the same. 



ust. Urostyle. 



v. Ventricle. 



v.c. Vertebral column. 



v.s. Vocal sac. 



i. to v. Digits i. to v. 



