vi THE NAUTILUS. 
Solariidee, description of two new Eocene . iy See 
Solarium elaboratum Conr. var. bimixta Aldr. n. var. (PI. 
Te ieee 512.13) tik A baa 
Solarium planiforme huge n. sp. (Pl. I, fi 4, 5,6) . 
Sora caught by a Mussel. (Illustrated) . 
Spheeria, on certain abnormal . 
Spherium Primeanum, 5. ona , 
Study of fossil shells . ee 
Teinostoma Hidalgoana Pilsbry, n. sp. . 
Thelidomus aspersa . 
To conchologists . ha Geb 
Trochomorpha fuscata Bence! note on . 
Unio borealis Gray in Michigan . 
Unio bursa-pastoris Wright, n.sp. (PI. III, a 1, 2) : 
Unio ellipsis and U. tenuisimus from Grand Rapid Mich. 
Unio Friersoni Wright, n. sp. (PI. III, a 3, 4). 
Unios in city reservior (Phila.) . 
Unionide, some notes on the genital organs awe eerie: 
to systematics 
Unios, the size of . 
Unios, new Florida . a A. 3) ee 
Unio Hartwrightii Wright, n. sp. (PL aL igs. 4, 5, 6) . 
Unio Oseari Wright. (PI. I, figs. 1, 2, & 
Unionidae, new American . 
Vallonia, North American species a ‘ 
Visit to a vessel that was loaded with shells . 
Vitrea Johnsoni Dall, n. sp. . ae 
Vitrina limpida in Western Penne ania . 
With a dredge [Southern California] . 
