− | The kidneys are dorsoventrally flattened. The renal pelvis opens into quite a large space of two major calicyes from which bud about 10 minor calyces. These attach to one renal papillae each. The kidneys have a smooth surface. | + | The kidneys are dorsoventrally flattened. The renal pelvis opens into quite a large space of two major calyces from which bud about 10 minor calyces. These attach to one renal papilla each. The kidneys have a smooth surface. |