152 CCELENTERATA. 



No. 476. Acervnlaria Davidsoni, E. and H. 

 Hamilton Group, Cedar Rapids, Iowa. 



No. 477. Acervularia Davidsoni, E. and H. 

 Polished specimen. Hamilton Group, Iowa City, Iowa. 



No. 478. Calciola sandalina, Defrance. 



This anomalous form is of doubtful relations, and has been put 

 by Davidson into a distinct family — the Calceolidse. It is pro- 



4i.-.c^^\ vided with an operculum, closing the mouth of the calice, and 

 was once referred to the Brachiopods. These specimens are from the Mid- 

 dle Devonian, Gerolstein, Prussia. 



No. 479. Caryophyllia clavus, Mch. 



Quaternary, Mt. Pelegrini, Sicily. 



No. 480. Cyathophyllum helianthoides, Goldf. 

 Middle Devonian. Gerolstein, Eifel, Rhenish Prussia. 



No. 481. Cyathophyllum Murchisoni, 



Polished section. Carboniferous Limestone, Bristol, England. 



No. 483. Cyclolites elliptica, Lam. 

 Lower Chalk, Beausset, France. 



No. 483. Hadrophyllum d'Orbignyi, E. and H. 



Corniferous, Clarke Co., Indiana. 



No. 484. Heliophyllum epigium, Hall. 



Corniferous (Devonian). Charlestown, Ind. 



No. 485. Heliophyllum Halli, E. & H. 

 Ilamiitoii (Moscow Shale), Moscow, N. Y. 



