CONTENTS 1 1 



Volume II. 



PAGE 



Suborder II. Serpentes (Snakes) 623 



Family 11. Leptotyphlopid^e 62+ 



22. Siagonodon ._ _ 62+ 



humilis (Western Worm Snake) . 625 



23. Leptotyphlops 627 



dulcis (Eastern Worm Snake) . 628 



Family 12. Bowje . 630 



2+. Lichanura 630 



roseofusca (California Boa) 631 



trivirgata (San Lucan Boa) 636 



25. Charina 638 



bottse 



botta: (Pacific Rubber Snake) 638 



utahensis (Great Basin Rubber Snake) 6+2 



Family 13. Colubrid^ 6++ 



26. Diadophis 6+7 



amabilis (Western Ring-neck Snake) 6+8 



regalis (Sonoran Ring-neck Snake) 652 



27. Heterodon 65+ 



nasicus (Western Hog-nose Snake) 655 



28. Coluber 658 



constrictor 



mormon (Western Yellow-bellied Racer) 660 



flagellum 



piceus (Western Whip Snake) 66+ 



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 



txniatus 



tseniatus (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 



