168 



Mr. H. R. Storer presented some curious hollow tui 

 cones, about two thirds of an inch long, most of them with 

 a spiral groove upon them, produced by pouring melted tin 

 into cold water. He also presented a number of Reptilian 

 eggs, from Maine, probably those of the Snapping Turtle, 



Mr. J. M. G. Parker was elected a Resident member. 



December 17, 1851. 

 The President in the Chair. 



Dr. Cabot, referring to the statement of Dr. Brewer, at 

 the preceding meeting, that the two species of Hermit 

 Thrush differ only in the length of the legs, said he had 

 noticed that one is of a reddish, the other of an olive color. 



The President gave an account of the original discovery, 

 in the south of France, of the remains of the Deinotherium, 

 and of subsequent discoveries in different localities in 

 Europe down to the present time. He exhibited a cast of 

 a tooth and engravings of the cranium, &c., describing their 

 structure. In comparing this animal with the Mastodon 

 giganteus he alluded to the fact, that there are now in 

 scientific collections five Mastodons of this species, three in 

 America and two in Europe. He likewise exhibited the 

 cast of a part of a fossil jaw of an unknown animal resem- 

 bling the Mastodon, from the Himalaya Mountains. 



Mr. Desor referred to a statement in the Annals and 

 Magazine of Natural History, that the Pedicilhrice, which 

 are found in Echini are parasites, and that they are also 

 found in shells. He asked Mr. Ayres's opinion on the 

 subject. 



Mr. Ayres said, that he had noticed about the base of the 

 arms in Ophiuridce. small worm-like projections, which he 



