322 THE CANADIAN NATURALIST. [Sept. 



forcibly recall certain Polyzoa. The stomach and intestine 

 form a simple chamber, alternating in their contractions, and 

 forcing the particles of food from one portion to the other. At 

 this time, also, the brownish appearance of the walls of the 

 stomach resembles the hepatic folds of the Polyzoa. In another 

 figure he showed a more advanced stage, where a fold was seen on 

 each side of the stomach ; from this fold the complicated liver of 

 the adult is developed, first, by a few diverticular appendages. 



When the animal is about one-eighth of an inch in length, the 

 lophophore begins to assume the horseshoe-shaped form of Pecti- 

 natella and other high Polyzoa. The mouth at another stage 

 begins to turn towards the dorsal valve (ventral of authors), and 

 as the central lobes of the lophophore begin to develope, the 

 lateral arms are deflected. In the.se stages an epistome is very 

 marked, and it was noticed that the end of the intestine was 

 held to the mantle by attachment, as in the adult, reminding one 

 of the funiculus in the Phylactolcemata. 



Prof. Agassiz rose at the termination of the reading of Mr. 

 Morse's paper, and said that it had been many a year since he 

 had listened to a paper more important to the progess of science. 

 That now, after many years and many failures, they had at 

 length a foundation for the homologies of the Brachiopods. He 

 also recommended that this paper should be published, not with 

 the usual meagre illustrations, but with a fullness worthy of the 

 subject. He regretted that Mr. Morse had not given them more 

 of the details of his investigations. 



VERTEBRATE REMAINS IN NEBRASKA. 

 By Prof. 0. C. Marsh. 



The locality described by Prof Marsh was the Antelope 

 Station, on the Pacific Railroad, in south-western Nebraska. 

 While engaged in sinking a well at that place, in June, 1868, a 

 layer of bones was found by the workmen at a depth of sixty- 

 eight feet below the surface, which were at first pronounced to be 

 human, but during a trip to the Rocky Mountains, Professor 

 Marsh examined the locality and bones, and found that the latter 

 were remains of tertiary animals, some of which were of great 

 interest. The well was subsequently sunk about ten feet deeper, 

 and the bones obtained were secured by the professor. An ex- 

 amination proved that there were four kinds of fossil-horses, one 



