155 



March 4, 1857. 



Dr. C. T. Jackson, Vice-President, in the Chair. 



Mr. Amos Binney presented, in the name of his brother, 

 a Monograph on the group of American Helices repre- 

 sented by H. fuliginosa. Referred to the Publishing 

 Committee. 



Mr. Amos Binney also presented, in the name of his 

 brother, the following paper : 



DESCRIPTIONS OF TWO SUPPOSED NEW SPECIES OF AMERICAN 

 LAND SHELLS, BY WM. G. BINNEY. 



1. SUCCINEA LINEATA. 



Testa oblongo-ovata, solidior, albida aut cinerea; spira elevata, 

 acuta ; anfractus 3 convex!, lineis parallelis inter rugas incre- 

 mentales volventibus ornati ; sutura impressa ; apertura orbiculata- 

 ovata, oviformis, partem testae dimidiam tequans ; columella pli- 

 cata, callo albo induta. 



DESCRIPTION. 



Animal not observed. 



Shell oblong-ovate, with three very convex whorls ; spire ele- 

 vated, acute ; surface marked with irregular wrinkles of growth, 

 between which are coarse parallel revolving lines, somewhat 

 removed from each other. Aperture large, about as long as one 

 half of the whole length of the shell, egg-shaped ; columella 

 folded; a deposition of callus on the parietal wall of the aperture. 



Greatest diameter, 6 ; alt. 12 millimetres. 



Geographical Distribution. Collected in considerable quantity 

 by Dr. F. V. Hayden,on high hills near Fort Union. 



Jiemarks. The specimens collected being dead and eroded, it 

 is impossible to say what is the color of the shell when fresh. It 

 is probably ashy white, I'esembhng the true S. campestris of the 

 Southern States. The revolving lines which distinguish it at 



