FIGURE 10 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes

FIGURE 10. Details of natricid apical morphology. A, Rhabdophis tigrinus (CAS 166939) showing well developed calyces on the lobes. Although not clear in this photo, each calyx has a single spine protruding from its center. B, Xenochrophis cerasogaster (CAS 245195), right lobe showing pocket at the distal end of the nude area (shadowed paraboloid area). The nude area is on the sulcate face of the lobe (right lobe twisted laterally); compare Figs. 8C and 9A.