LIT. 



of ants, each of which lived upon the secretions of a 

 peculiar species of aphis. 



Ed. S. Morse, of Portland, whose especial study is the land 

 snails, gave an account of the collection made by himself and 

 Mr. Bolles during the morning, stating that he had found 

 several specimens of two very rare species of minute snails. 

 The structure of these little snails, furnished, like most of 

 the larger species, with a shell, which is secreted by, and 

 is a part of the animal itself, and not a house which it can 

 leave at will, as is commonly supposed, was explained by 

 drawings. He also showed the position and shape of the 

 hundreds of microscopic teeth with which the snail's 

 tongue is furnished for the purpose of rasping its food. 



Mr. Morse read the following list of Terrestrial Mol- 

 lusca collected at Gloucester during the morning. 



Tebennophorus dorsalis Binney. Helix ferrea Morse. 



Limax campestris Binney. " Binneyana Morse. 



Helix striatella Anthony. " exigua Stimpson. 



" labyrinthica Say. Vertigo ovata Say. 



" arborea Say. Pupa pentodon Say. 



" chersina Say. Succinea Totteniana Lea. 



" lineata Say. " avara Say. 



" milium Morse. Melampus bidentatus Say. 



A. C. Goodell Jr., called the attention of the meeting to 

 the little neglected barnacle on the rocks, and after 

 giving an interesting description of its structure, which 

 he illustrated by a drawing of that portion of the animal 

 under the shell, he favored the meeting by reading a few 

 stanzas, fou nd in his pocket, relating to the little crusta- 

 cean.' 



F. W. Putnam, of Salem, being called upon to explain 

 the structure of the lobster and other animals that had 

 been collected during the day, gave a brief account of 

 the various animals, and by a comparison of the lobster 

 with the young barnacle, which for a short period of its 

 life, is a free swimming animal, showed how closely related 

 were the ^vo, and how erroneous was the common opinion, 



