37 



they could do. The present disturbed condition of political 

 affairs in Europe must, for a time, suspend the progress of 

 science there. It was for us now to make a strenuous, self- 

 sacrificing effort to carry it forward here. A short period 

 of persevering labor on the part of a number of individuals 

 would place America in the position hitherto occupied by 

 the Old World. 



June 7, 1848. 

 The President in the Chair. 



Present, fourteen members. 



Dr. Gould had recently examined the Shells collected by 

 Mr. J. Bartlett, in the south-western States, for the late Dr. 

 Binney, in reference to his proposed work on the Land Mol- 

 lusks of the United States, and which Dr. B. had been una- 

 ble to examine previous to his decease. Dr. G. was pleased 

 to find several new species of much interest, as they tended 

 to illustrate the gradual modification of species in their geo- 

 graphical succession. He gave descriptions of the following : 



SucciNEA LUTEOLA. Tcsta variabiH, ovato-turrita, solidiuscula, 

 laxe striata, extus alba vel cornea, sed plerumque lutescente, 

 intus lutea ; anfr. 4, supernis rotundatis, ultimo conico-ovato ; 

 apertura modica, ovata, partem dimidiam longitudinis vix supe- 

 rante ; columella normaliter arcuata, baud pllcata, ad regionem 

 umbilicalem reflexiuscula. Long. ^, lat. |- poll. Hah. Texas. 



Very variable in its proportions as well as in coloring. Short 

 specimens resemble S. campestris of the South, but want its col- 

 umellar fold. The elongated specimens are like S. amphibia ; 

 and in the diminutive size of the aperture it is like S. vermeta. 

 Fresh specimens are well characterized by their golden yellow 

 color. It may possibly be Say's S. undulata. 



