vl THE NAUTILUS. 
Pyramidula rupestris in’ Mame .”."........./. 00 scree 58 
Pyramidula rupestris var. nylanderi Morse, n var. (fig.1) 59 
Pyramidula shimekn Pils. .... 2.02... «+. ce soe 6 
Razor shell, the leaping os. ova. .s see cee 95 
Schasicheila walker1 Hinkley, n. sp. ..........-sece00e 53 
Schizoplax multicolor Dall, nh. sp... .. . .). ce ok eee 22 
Siphonaria japonica (Dons) ic. . i. is os s,s 141 
Soleh ensis My... 5 ess Dew vn ere, shores = bse te 96 
Sowerby, Georde Bretiingham ....... i... 2 cee eee 137 
Spisula solidissimar ss 2s <4 bie «tein. cs chee See 59 
Strobilops strebeli guatemalensis Hinkley, n. subsp. ..... 52 
Suceinea rétusa Hea |). .)s 3 occ t= bisie sie le eee 10, 28, 62 
Tapes philippinarum in the Hawaiian Islands ......... 107 
Teoula hemphilli Oldroyd, nh. sp. <s.... «saan eee eee 115 
Thysanophora horni \.).'.'..' .0:'. = «4 2s 22s <p ee 18 
Tornatina tumida'Oldroyd, n: sp. ‘.. <..).w.0 soa 116 
Turritidadé vs. TOrridae, 5 ...2% . i826 Ges eee 21,97 
Vallonia pracilicostata Keinh. ... <2: ..2.. ssp eee 
Valvata' lewisii helicoidea' Dall . 2. JV a ee eee 68 
Venus statzert Don. i. ..3\0.6 > <cin wn) sles i eee 141 
Vermetus nodosus Oldroyd, n..sp.......<. +6 astus eee 116 
Vertigo modesta insculpta Pils... .. °. 2.0.05. 2>2 ese 14 
Mitrina alaskana ‘Dall’... 2002's. ./sis «ecco ae ee 14 
Vivaparus waltou Tryon '.’.'.\...'... 23 6 ss see 31 
Wilder, Willian” | °..5 2's,0)s s'e4.o)008 sina de ts le eee 101 
Yion National Park. sliellS of .... 2.2 2.0h¢ cc eee 140 
Yonitoides alachuana Dall |. .'....00. ci... oe pe ee 14 
ZFonitoides nummus Van. in Indiana *. 5: .%... eee 70 
