ANNELIDA. 



Ill 



No. 453. Serpula . 



The Serpula derive their name from the tortu- 

 ous and twisted tubes they inhabit. These tubes 

 are calcareous and quite elaborate, and are seen on 

 our sea-coasts incrusting stones, shells, driftwood, 

 sea- weed, &c. In the tropical waters, the shelly | 

 exuvias of living species form banks, resembling 

 coral-reefs in their solidity and strength. The animal is fixed, and lower in rank 

 than the naked Annelids. The original of this specimen, attached to a fragment 

 of stone, is from the Raised beaches (Pleistocene) of the eastern shore of the Red 

 Sea, and is in the Ward Museum of the University of Rochester. Price, $0. 60 



No. 454. Serpula . 



A very large and singularly twisted and ornamented specimen from the Up- 

 per Miocene beds of Asti, Piedmont. The original is in the private Geological 

 Cabinet of Mr. Ward, Rochester. Size, 6x8. Price, $1.00. 



No. 455. Tentaculites elongatns, Hall. 



This fine specimen of the annulated shelly case of an ancient Palse- 

 zoic worm is from the Lower Helderberg (Upper Silurian) beds of 

 Schoharie Co., N. Y. Price, $0.30. 



