IV THE NAUTILUS. 



Campeloma rufum nieridionale Pils., n. subsp. . . 42 

 Ceriphasia Swain,, replaces Pleurocera Try on . . .114 

 Cerithium branneri Hall & Ambrose, n. sp. . . 70 



Chitons, fossil Calif ornian . . ... 71 



Chromodoris zebra Heilp. ..... 103, 140 



Columbella arnoldi Dall, n. n. for C. minima Arnold . 26 

 Columbella hypodra Dall, n. n. for C. variegata Stearns . 27 

 Columbella lucasana Dall., n. n. for C. festiva Kiener . 25 

 Columbella milium Dall, n. n. for C. parva Sowb. . . 26 

 Columbellidae, notes on the West American . . .25 

 Common names ..... . 120 



Contradens cambojensis (Sow. ), the anatomy of . . 106 

 Cypraea, monstrosities in. ...... 34 



Euconospira missouriensis, a color-marked . . .114 

 Euconulus chersinus trochulus Reinh., in New Jersey . 72 

 Eulimastoma, a new subgenus of Pyramidellids . . 73 

 Eurynia arkansasensis Lea . . . . . .54 



Eurynia lienosa Conr. ....... 55 



Eurynia subrostrata Say ....... 55 



Fresh-water mollusca of Oneida Lake, N. Y. . . .5 



Fresh-water shells from Central and Western N. Y. . . 29 

 Gonidea angulata, the anatomical structure of . . .50 

 Goniobasis in Western Pennsylvania. .... 4 



Goniobasis pennsylvanica Pilsbry, n. sp. . . . . 4 



Gwatkin, Henry Melvill (obituary) . . . . .119 



Helices, antiquity of the ....... 83 



Hemphillia malonei Pilsbry, n. sp. (PI. IV, fig. 9) . .117 

 Holospira bryantwalkeri Pilsbry, n. sp. (PI. IV, fig. 6) . 124 

 Horatia (Hauffenia) micra P. & F. . . . . .84 



Hyriopsis myersiana (Lea), the anatomy of . .85 



Kobelt, Dr. Wilhelm 12 



Lampsilis luteola group, notes on . . . .74 



Lampsilis radiata oneidensis F. C. Baker, n. var. (PI. II). 74 

 Lampsilis ventricosa satur Lea ...... 56 



Lemiox rimosus Raf., the anatomy of . . .39 



Leptoxis Raf., replaces Anculosa . . . . .114 



Limax Arborum in a Colorado greenhouse. . . . 120 



Loboa brunoi von Ihering n. gen. and sp. (PI. IV, fig. 7). 121 

 Macoma wilcoxi Hall & Ambrose, n. sp . . . .81 



Mactra beali Hall & Ambrose, n. sp . . . . .80 



Marty n's Universal Conchologist .... 130 



Melanella iotoides Bartsh, n. n. for M. iota . . .72 

 Mesodesma pacifica Hall and Ambrose, n. sp . . .79 

 Missouri mussels, breeding records of . . . .13 



Missouri River as a faunal barrier . . . . .92 



Mollusca from San Bernardino Co. , Cal., additional records. 37 



