CONTENTS 



Volume II 



PACE 



Suborder II. Ser-pentes (Snakes) 623 



Family 11. Leptotyphlopid^ ^24 



22. Siagonodon - — 624 



humilis (Western Worm Snake) — 625 



23. Leptotyphlops 627 



dulcis (Eastern Worm Snake) 628 



Family 12. Bom.^ 630 



24. Lichanura — 630 



roseofusca (California Boa) 631 



trivirgata (San Lucan Boa) 636 



25. Charina 638 



bottas 



bott^ (Pacific Rubber Snake) 638 



utahensis (Great Basin Rubber Snake). _ 642 



Family 13. Colubrid/^ 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). v 683 



tajniatus 



tsniatus (Western Striped Racer) 685 



