THE NAUTILUS. 9 



Vertigo boUesiana Morse, from J^ew York or Ohio,' and also the 

 lamell?e are much alike. One }Deculiarity is that in about one-thii"d 

 of the examples a part of the shell is wanting, always on the side of 

 the ajjerture, so that 3 or even 4 whorls are opened. This can hard- 

 ly be accidental, and probably that part of the thin shell is worn off 

 by friction in moving. I would propose to name this form var. cata- 

 linaria ; others might regard it as a species, as it appears to be rather 

 well defined, and distinct from the other forms. 

 {To be continued.^ 



AMERICAN ASSOCIATION OF CONCHOLOGISTS. 



June 4, 1890. 



John H. Campbell, President, Philadelphia. Cypraeklae. 

 Charles W. Johnson, Secretary, Philadelphia. South American 

 Mollnsca. 



Frank C. Baker, Philadelphia, Pa. Mnricidae. . 



Rev. W. M. Beauchamp, Baldwinsville, X. Y. Land and Fresh 

 Water Shells of Xorth America. 



Theodore G. Brinton, Philadelphia, Pa. Mitridae. 



J. J. Brown, M. D., Sheboygan, Wis. 



F. C. Browne, Framingham, Mass. Nassidae and Strophia. 



H. F. Carpenter, Providence, R. I. Shell-bearing Mollusca of 

 Rhode Island. 



Prof AVm. B. Clark, Baltimore, ]\[. D. Eocene Mollusca. 



Thomas C. Curry, Connersville, Ind. Succineidae. 



Wm. H. Dall, Washington, D. C. Abyssal Molliisks. 



Rev. A. Dean, Muncy, Pa. Fusidae. 



Geo. W. Dean, Kent, Ohio. Helicidae. 



James M. Delaney, Rochester, X. Y. 



L. B. Elliott, Iowa City, Iowa. Dentition. 



Frank J. Ford, Wichita, Kan. Papidae. 



John Ford, Philadelphia, Pa. Olividae. 



T. Marshall Fry, Syracuse, N. Y. Unionidae. 



Uly. S. Grant, Minneapolis, Minn. Laud and Fresh Water shells 

 of North America. 



1 The New York and Ohio specimens of V. bollesiana are larger ami more 

 distinctly striate than those from New England and Canada. 



