96 



To a space three inches in length and one in width were attach- 

 ed twenty or more of different sizes. In some instances the head 

 of the animal protruded, having pierced the intestine, while the 

 body remained within. 



Baron Benjamin Delessert, of Paris, was elected an hon- 

 orary member. 



ADDITIONS TO THE CABINET. 



A Box of Crustacea from Terra del Fuego. From Joseph P. 

 Couthouy. 



Specimens of the imbricated bony plates found beneath the skin, 

 on the humeral region of the Horse Mackerel, (Thynnus vulgaris). 

 From Dr. Toomey of Chelsea. 



January 18, 1843. 



Mr. Bouve was appointed Chairman. 



Mr. Teschemacher reported on some slabs of slate with 

 dendritic markings, recently quarried in Newton. 



The stone is a quartzose argillaceous slate, of a light gray color, 

 contrasting beautifully with the dendritic markings. These mark- 

 ings suggest the idea that they are the remains of Algae. Mr. T. 

 found no trace of organic matter in their composition ; on the other 

 hand, their metallic nature was established by obtaining a globule 

 of Manganese. He supposes the particles of Manganese to have 

 subsided, in the solution in which they were contained, and to 

 have assumed a dendritic form by pressure between the layers. 

 He in fact exhibited the same appearance, which he had obtained 

 by pressing manganese between two plates of glass. Similar 

 markings, though less noticeable, are found in the Roxbury pud- 

 ding-stone, and in a similar German sandstone. 



Dr. Wyman read a Report on the Chimpanzee presented 

 by Dr. Savage. He compared the skeleton and all the vis- 

 cera, in detail, with those of man, and the onrang ontang. 



He also exhibited, in behalf of Dr. Storer, the ovary of a striped 

 bass. From some unknown cause, the annual product of eggs 



