122 
Ulinski 
Figure 1. A transverse section through the brain of a water snake (Matrix sipedon) is shown in a Nissl 
preparation. The inset is a sketch of a water snake brain in dorsal view. The line indicates the level of 
the section which appears in the main part of the figure. The laminated cortex lies above the lateral ven- 
tricle. The septum (S) and anterior dorsal ventricular ridge (ADVR) lie beneath the ventricle. ADVR is 
separated from the subjacent striatum (ST) by a cell-poor area. 
