88 



Cincinnati Society of Natural History. 



the basal epitheca to the outer surface ; walls thin ; small spiniform 

 corallites at the angles of junction of the corallites | tabulae fairly well 

 developed, complete and horizontal, increasing in numbers toward 

 the surface. (Jour. Cin. Soc. Nat. Hist., vol. i, 1878, p. 26; 

 Nicholson, Genus Montic. , 1881, p. 185.) 

 Locality. — Cincinnati, O. 



Remarks. — This is a peculiarly shaped species and one very 

 readily recognized. It was compared originally by its describers to a 

 11 little wooden shoe." They 11 suppose it to have begun from an 

 embryo or a ciliated animalcule floating free in the water, and giving 

 rise to a colony by gemmation from either side and from one end, 

 leaving the other as a central tube or cavity." It is not generally 

 considered as taking its form by growing parasitically upon any 

 foreign body. 



( To be continued.) 



