THE NAUTILUS. Vll 



Urocoptis Elliotti Poey . , 50 



Urocoptis (Gongylostoma) alvearis Torre, n. sp. 78, 79 



Urocoptis (Gongylostoma) cioniscus Torre, n. sp. 46, 79 



Urocoptis (Gongylostoma) dilatata Torre, n. sp. . 47, 79 



Urocoptis (Gongylostoma) dimidiata Torre, n. sp. . 77, 79 



Urocoptis (Gongylostoma) dimidiata intermedia Torre, 



n. var. . . .... 77, 79 



Urocoptis (Gongylostoma) fall ax Torre, n. sp. . . 47, 79 



Urocoptis (Gongylostoma) intuscoarctata Torre, n. sp. 76, 79 



Urocoptis (Gongylostoma) proteus Torre, n. sp. 43, 79 

 Urocoptis (Gongylostoma) proteus castanea Torre, n. 



var. ... 44, 79 



Urocoptis (Gongylostoma) proteus robustaxis Torre, n. 



var. ... . . . 44, 79 



Urocoptis (Gongylostoma) mayajiguensis Torre, n. sp. 45, 79 

 Urocoptis (Gongylostoma) mayajiguensis fulva Torre, 



n. var. 45, 79 



Urocoptis (Gongylostoma) remediensis Torre, n. sp. 45, 79 



Urocoptis (Gongylostoma) tuba Torre, n. sp. . . 78, 79 



Urocoptis (Gongylostoma) turgida Torre, n. sp. . 75, 79 



Urocoptis (Gongylostoma) uberrima Torre, n. sp. 76, 79 



Urocoptis (Gongylostoma) villarensis Torre, n. sp. . 42, 79 



Unio, A new Florida ... . .29 



Unio, etc. , The use of the generic name . . . .88 



Unio cicatricoides Frierson, n. n. (PI. II). . . .53 



Unio compertus Frierson, n. sp. (PL III). . 53 



Unio detectus Frierson, n. n. (PI. II, III) . . 52 



Unio tenuisculus Frierson, n. sp. (PI. I, figs. 4-6) . . 29 



Unio varicosus and cicatricosus, Remarks on . . 51 



Unionidae. ... . . , 7 



Vallonia in Chicago. . . 95 



Vertigo concinnula Ckll. . . . . . .124 



Vertigo modesta parietalis Ancey . . 59 

 Vitrea lewisiana Clapp ....... 122 



Vitrea multidentata Binn. . . . . . .125 



Vitrea radiatula electrina var. circumstriata Taylor . . 125 

 Vivipara japonica Mart. .... 



Vivipara malleatus Rve. . 31 



Vivipara, Asiatic, in California. . 31 



Voluta junonia. . . .81 



