vi THE NAUTILUS. 
Sonorella elizabethe Pils. & Ferr., n. sp. ............ 20, 41 
Sonorella hinkleyi Pils. & Ferr., n. sp. .............. 19, 38 
sonorella insignis Pils. .& Ferr.,n. sp.2¢ 5.2.0 eee 21 
Sonorella montana Pils..&.Werr.. 3. se eee 19, 38 
Sonorella montezuma Pils. & Ferr., n. sp. ............ 20, 41 
Sonorella mustang Pils. & Ferr., n. sp. oe gee ee 20 
Sonorella patagonica Pils. & Ferr.,n. sp. ............ 20, 40 
Sonorella tumacacori Pils. & Ferr., n. sp. ............ 19, 38 
Sphirerium hendersoni: Sterki <2). 21. 72 20 eee 105 
staten Island, Marine; Mollusea of: .2... 2. 2S 1414 
Subemarginula. yatest:Dalh. v.05... 6 se dne eee 27 
Tebennophorus. carolanensis: :.).)..... 45...) one eee 80, 86 
Thysanophora excoides (Tate), fig. 4 ................. 
Thysanophora fuscula (C. B. Adams), fig. 1 ........... 94 
Thysanophora plagioptycha group, review of the ....... 93 
Torticella haldemani «White »..:....))::).-.. 4. ene 118 
Tritonalia fraser: Oldroyd, n. sp...) 2 ee eee 135 
Turritidae versus ‘Turridae ') 2.) 1. Ae eee 130 
Unio pressus: Lea: i525). Oe ee ee 127 
Velutina cryptospita Midd, |;..).../.3.).).41 eee ee 25 
Velutina rubra Willett, n.sp... 4:2. 0002 See eee 25 
Vertigo allyniana Berry; n.-sp. ss 22/31.) 51 
Vertigo allyniana xenos Berry, n. subsp. .............. a2 
Vertigo californiea dieroensis St...) 2 0 pee 64 
Vertigo hebarda Van. oo .3i ss ee 141 
Vertigo ovata in. Florida (0c)... 8 er eee 141 
Vertigo modesta microphasma Berry, n. subsp. ......... 48 
Vitrea (Paravitrea) lamellidens Pils. ........ Ot, See 115 
Vitrea (Paravitrea) multidentata Binn. ............... 115 
Vitrea (Paravitrea) pilsbryana Clapp, n. sp. .......... 9 
Vivipara(?) emmonsi Henderson, n.n. ............... 119 
West Coast Shells «25003 000280.050d0 5. ben ee 135 
Yoldia (Portlandia) astoriana Henderson, n. n. ........ 122 
