243 



stomach of a healthy ox, on the banks of the Nueces, in 

 Texas. Its surface was smooth, hard, and apparently 

 calcareous. 



Dr. D. H. Storer remarked that balls of this character 

 were occasionally found here ; not, however, so large as 

 this. Quite a large one from the stomach of a hog, com- 

 posed of bristles, was sent recently to the Society for 

 Medical Improvement. The hairs are introduced into 

 the stomach in the process of licking the skin. 



Dr. H. R. Storer presented specimens of a Smelt from 

 Squam Lake, N. H., remarking on its peculiar interest, 

 as affording an instance of a species originally migrating 

 to fresh water from salt water, and now permanently 

 resident in the former. 



Dr. Storer said that he had learned of its existence several 

 years since, but had, until now, been unable to obtain it. When 

 full groAvn the lake smelt seldom exceeds six inches in length and 

 is extremely attenuated, but a careful examination leaves little 

 doubt of its identity with our marine Osmerus viridescens. It is 

 found throughout the year, in both Squam Lake and Winnipi- 

 seogee, though more rarely in the latter. The modifications in 

 shape referred to, would probably be found to exist also in the 

 smelt of Jamaica Pond, near Boston, specimens of which had 

 already been presented to the Society ; the conditions of life 

 being much the same in both, the latter having been imprisoned 

 artificially, while the former had become a permanent resident in 

 fresh water from natural causes alone. 



It was once supposed that the salt water Cusk was found in 

 the New Hampshire lakes, but Dr. D. H. Storer had proved, in 

 the Journal of this Society, that the fishes in question were not 

 only specifically but generically distinct. 



Dr. Storer also presented two species of Leuciscus, one of 

 them probably undescribed, from the same locality. 



MARYLAND MARBLES AND IRON ORES. 



Dr. C. T. Jackson stated that he had recently examined the 

 marble and limestone quarries of Texas, Maryland, for Mr. Wil- 



