AET. 13 A NEW LOWER CAMBRIAN HYDBOZOAN RUEDEMANN 7 



R&tTharks. — The specimen is very incomplete and therefore leaves 

 much to be desired in the evidence for its taxonomic position. Yet 

 the radiate surface sculpture and especially the spongy, porous 

 body in the center clearly place this fossil in the same group with 

 the much better known C. roddyi. Likewise the body is too sub- 

 stantial to be derived from a soft medusa ; for although found in a 

 much compressed argillaceous slate in which organic remains are 

 completely flattened out, as is Dactyloidites radiatus^ the impression 

 of this C wtwpto stroma reaches 1.6 mm below the surface of the 

 bedding plane along the scalloped margin and twice as much in 

 the central bulge. If there was a corresponding excavation on 

 the other side of the bedding plane, as we must assume, the body 

 reached a thickness of over 6 mm in the shale; certainly a good 

 proof of a solid structure in the living organism such as is indi- 

 cated by the small patch of meshwork in the center. 



Horizon and locality. — Lower Cambrian: North Granville, N. Y. 



Holotyye.~\],^:^M. No. 85951. 



