156 



aperture, are its most conspicuous characters. The revolving 

 fawn-colored lines only appear when its deep brown epidermis is 

 removed. 



The President presented five teeth and a tynnpanic bone 

 of the Zeuglodon, and gave an account of the observations 

 upon this animal by Dr. Harlan, Prof. Owen, and Dr. 

 Gibbes. He likewise presented three Peruvian skulls from 

 the vicinity of Lake Titicaca. 



The President pointed out the remarkable resemblance ex- 

 isting between these skulls and those found in the mounds of the 

 western part of the United States, specimens of which he exhibit- 

 ed to the Society. He compared them also with an Indian 

 skull dug up in Quincy, Mass., showing a very great difference of 

 shape, the general contour of the head being much more round 

 in the former, with a remarkable flatness cf the posterior region 

 and vertex, and greater breadth of forehead. The skull from 

 Quincy was oval, and presented the great depth of the palatine 

 fossa, so characteristic of the North American races generally. 



On motion of Mr. Bulfinch, Dr. John Bacon, Jr. was elect- 

 ed on behalf of the Society, a delegate to the next meeting 

 of the British Association for the Promotion of Science. 



Mr. Burnett presented in the name of Mr. Joseph Bur- 

 nett, a specimen of Sponge attached to the rock on which 

 it grew. The thanks of the Society were voted for the 

 donation. 



Dr. Gould presented, in the name of Gould, Kendall & 

 J-iincoln, three books, namely, The Pre-Adamite Earth, 

 and Man Primaeval, by John Harris, and Earth and Man, 

 by Professor Guyot. The thanks of the Society were voted 

 for the donation. 



Mr. Ayres presented a young salmon Si inches long, 

 showing the transverse bands which do not exist in the 

 adult fish. 



Dr. Kneeland presented the following specimens, namely, 

 Physalia or Portuguese Man of War ; several species of 

 fish and crabs from the reef at Pernambuco, Brazil ; crabs 

 and other crustaceans from the Gulf weed of the Atlantic ; 



