282 



which are strung together in a vertical position, and pass for the back 

 bone of a giant of similar height. 



Another interesting relic has been denominated by the proprietor, 

 Missourium Kochii, the first name in commemoration of its locality, 

 the second of himself, its discoverer. It belongs undoubtedly, Dr. 

 Horner states, to the Mastodon race; was not much inferior in size 

 to the Elephant, and was furnished with tusks and indications of a 

 proboscis having been attached to it. The tusks are four and a half 

 feet in length, and at the roots have a circumference of eighteen 

 inches ; they are only half an inch apart at the socket, and project 

 right and left, with the concavity forward. The teeth have the mam- 

 millose or Mastodon shape and conformation, and are three and a half 

 inches in length by two and a half in breadth. The lower jaw is 

 wanting. 



There is an os humeri, probably of a megalonyx, which measures 

 in length one foot eight inches, the ulna of the same animal, and also 

 other bones, probably the radii, with some of the last phalanges. 



Dr. Horner stated, that his sketch of this rich accumulation of fossil 

 remains, and their examination were very imperfect, and the less in- 

 structive to him, for the want of standards of comparison in perfect 

 skeletons, and in plates, neither of which means of elucidation exist in 

 St. Louis, and he expressed a hope, that " their diligent and deserv- 

 ing collector, would furnish the scientific world with exact plates of 

 such as are rare or unknown." 



A communication was read from Miss Margaretta H. Mor- 

 ris, on the subject of the Hessian Fly, and of the Seraphion 

 Destructor, — a parasite of the same. The communication was 

 referred to a committee. 



Mr. Lea read a paper, entitled "Descriptions of New Fresh 

 Water and Land Shells, by Isaac Lea," which was referred to 

 a committee. • 



Mr. Nuttall read a communication, entitled "Descriptions of 

 New Species and Genera of Plants in the Natural Order Com- 

 positse, collected on a Tour across the Continent to the Pacific, 

 a Residence in Oregon, and a Visit to the Sandwich Islands 

 and Upper California, during the Years 1834 and 1835, by 

 Thos. Nuttall," which was referred to a committee. 



Dr. Hays made some remarks on a printed description of 

 two fossil animals, by Mr. Koch, of Missouri; the one a Mas- 



