Vi THE NAUTILUS. 



Sonorella elizabethae Pils. & Ferr., n. sp 20, 41 



Sonorella hinkleyi Pils. & Ferr., n. sp 19, 38 



Sonorella insignis Pils. & Ferr., n. sp 21 



Sonorella montana Pils. & Ferr 19, 38 



Sonorella montezuma Pils. & Ferr., n. sp 20, 41 



Sonorella mustang Pils. & Ferr., 11. sp 20 



Sonorella patagonica Pils. & Ferr., n. sp 20, 40 



Sonorella tumacacori Pils. & Ferr., n. sp 19, 38 



Sphaerium hendersoni Sterki 105 



Staten Island, Marine Mollusca of Ill 



Subemarginula yatesi Ball 27 



Tebennophorus carolinensis 80, 86 



Thysanophora cascoides (Tate), fig. 4 95 



Tliysanophora fuscula (C. B. Adams), fig. 1 94 



Thysanophora plagioptycha group, review of the 93 



Tortieella haldemani White 118 



Tritonalia fraseri Oldroyd, n. sp 135 



Turritidae versus Turridae 130 



Ilnio pressus Lea 127 



Velutina cryptospira Midd 25 



Velutina rubra Willett, n. sp 25 



Vertigo allyniana Berry, n. sp 51 



Vertigo allyniana xenos Berry, n. subsp 52 



Vertigo ealifornica diegoensis St 64 



Vertigo hebardi Van 141 



Vertigo ovata in Florida 141 



Vertigo modesta microphasma Berry, n. subsp 48 



Vitrea (Paravitrea) lamellidens Pils 115 



Vitrea (Paravitrea) multidentata Binn 115 



Vitrea (Paravitrea) pilsbryana Clapp, n. sp 9 



Vivipara( ?) emmonsi Henderson, n. n 119 



West Coast Shells 



Yoldia (Portlandia) astoriana Henderson, n. n 122 



