CONTENTS 1 1 



VOLUME II. 



PAGE 



Suborder II. Ser^entes (Snakes) . 623 



Family 11. LEPTOTYPHLOPIM; 624 



22. Siagonodon 624 



humilis (Western Worm Snake) 625 



23. Leptotyphlops 627 



dulcis (Eastern Worm Snake) 628 



Family 12. BOID;E 630 



24. Lichanura 630 



roseofusca (California Boa) 631 



trivirgata (San Lucan Boa) 636 



25. Charina 638 



bottas 



bottae (Pacific Rubber Snake) 638 



utahensis (Great Basin Rubber Snake) 642 



Family 13. COLUBRIDJE 644 



26. Diadophis 647 



amabilis (Western Ring-neck Snake) 648 



regalis (Sonoran Ring-neck Snake) 652 



27. Heterodon 654 



nasicus (Western Hog-nose Snake) 655 



28. Coluber 658 



constrictor 



mormon (Western Yellow-bellied Racer) 660 



flagellum 



piceus (Western Whip Snake) 664 



anthonyi (Clarion Island Racer) 673 



semilineatus (Sonoran Racer) 675 



lateralis (California Racer) 678 



barbouri (Espiritu Santo Island Racer) 681 



aurigulus (Cape San Lucas Racer) 683 



tosniatus 



tcEniatus (Western Striped Racer) 685 



29. Salvadora 688 



hexalepis (Western Patch-nosed Snake) 688 



30. Phyllorhynchus 692 



browni (Brown's Leaf -nosed Snake) 693 



decurtatus (Lower California Leaf-nosed Snake) 695 



