FIGURE 7 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes

FIGURE 7. Everted hemipenes of Rhabdophis in sulcate view. A, R. nuchalis (CAS 242054) (detail of apex shown in Fig. 8A). B, R. subminiatus (CAS 206565) (detail of apex shown in Fig. 8B). C, R. tigrinus (CAS 166939). The sulcus spermaticus in A and C passes to the crotch, where it divides and each branch passes centripetally up the medial face of its respective lobe. In B the sulcus spermaticus passes to the edge of the crotch, divides, and each branch then passes toward the tip of its respective lobe in a position mainly on the sulcate face of the lobe.