vi 



THE NAUTILUS. 



Rhodacmea cahawbensis Walker, n. sp. (pi. 1, f. 4-6) 7 



Rhodacmea elatior Anth 8 



Rhodacmea filosa Conrad (pi. 3, f. 2) 6 



Rhodacmea gwatkiniana Walk., n. sp. (pi. 1, f. 3, 7, 9) . . 9 



Rhodacmea hinkleyi Walk 8 



Rhodacmea rhodacme Walk., n. sp. (pi. 1, f. 1, 2, 8; pi. 



3, f. 3) 8 



Rhodacmea Walker, n. gen 5 



Rhodacmeinae, n. subfam 5 



Rhodocephala Walker, n. sect 8 



Sampson, Francis Asbury (obituary) 137 



Shells collected at Anaheim Bay and vicinity 103 



Sigaretus, a new Californian 13 



Sinum californicum Oldroyd, n. sp 13 



Sonorella rooseveltiana Berry, n. sp 14 



Spatha kamerunensis Walker 77 



Spatha walbergi Krauss 77 



Sphaeriidae, notes on reproduction and growth in certain. 16 



Sphaeriidae of Oneida Lake, N. Y 84 



Strobilops labyrinthica texasiana Pils. & Ferr 114 



Succinea retusa Lea 93 



Thysanophora caeca Guppy (pi. 8, f. 3) 75 



Thysanophora dioscoricola C. B. Ads. (pi. 8, f. 2) 75 



Thysanophora macneilli Clapp, n. sp. (pi. 8, f. 1) 74 



Trachydermon lowei, n. sp 127 



Unio caffer Krauss 75 



Unio tetralasmus Say (pi. 7, f. 4) 49 



Unionidae of Oneida Lake, N. Y 83 



Unios, on the rate of growth of pond 49 



Vallonia cyclophorella septuagentaria Pils. & Ferr., n. 



var 95 



Valvata tricarinata perconfusa Walker, n. n 36 



Valvatidae of Oneida Lake, N. Y 89 



Vitrea radiatula circumstriata Taylor 115 



Vivarium, a home-made 105 



Viviparidaa of Oneida Lake, N. Y 86 



Viviparus malleatus and contectoides in Mass 107 



Walkerola Hannibal 2 



Winkley, Rev. Henry W. (obituary) 136 



Zachrysia emarginata Pfr. (pi. 7, f. 7) 79 



Zachrysia ramsdeni Pils., n. sp. (pi. 7, f. 5, 6) 78 



