that the barnacle was a mollusk, on account of its limy 

 shell. 



Prof. A. Crosby, of Salem, gave an account of the walk 

 taken by his party to the rocks, where many interesting 

 things were discovered, and several kinds of minerals 

 collected. 



Rev. S. Barden, of Rockport, exhibited a number of 

 the minerals that had been collected, and described the 

 structure of each. 



George F. H. Markoe, of Boston, explained the various 

 properties of the medicinal plants which he had collected, 

 and furnished the following list of plants seen during the 

 day. 



Drosera longifolia Epilobium lineare. 



Drosera rotundifolia. Cornus canadensis, in fruit. 



Leucanthemum vulgare. Scutellaria laterifolia. 



Maruta cotula. Spiraea tomentosa. 



Nymplioea odorata. Spirsea salicifolia, 



Nuphar advena. (Enothera biennis. 



Gaultheria procnmbens (Enothera pumila. 



Achillea millefolium. Antennaria margaritacea. 



Asclepias incarnata var. pulchra. Eupatorium purpureum 



Platanthera blephariglottis. Impatiens fulva. 



Sambucus canadensis. Lobelia cardinalis. 



Mitchella repens. Lobelia inflata. 



Leontodon auturanale. Lobelia spicata. 



Arctostaphylos uva-ursi, in fruit. Pontederia cordata. 



Hypericum perforatum. Sagittaria variabilis var. sagittifolia. 



Hypericum sarothra. Vaccinium oxycoccus. 



Elodea virginica. Lythruin salicaria. 



Silene inflata. Xyris bulbosa. 



Statice limonium. Solanum dulcamara. 



Clethra alnifolia. Oxalis stricta. 



Cuscuta Gronovii. Trifolium repens. 



Eupatorium perfoliatum. Trifolium pratense. 



Epilobium angustifolium. 



James H. Emerton, of Salem, exhibited a collection of 

 about an hundred species of insects, including many 

 species of spiders, the object of his special study, that had 

 been collected by him during the day. 



Rev. E. B. Willson, of Salem, made a few general 

 remarks upon the usefulness of these meetings in pro- 

 moting the study of Nature. 



