30 



Cincinnati Society of Natural History. 



tion of the name to American forms by placing it in italics, and said 

 that " it is not evident that this species is found in America." 



Monticulipora calyculus is recognized as a species, and placed in 

 his subgenus Diplotrypa. 



Monticulipora irregularis is placed in his subgenus Monotrypa. 



His Chetetes sig Mario ides is classed as a synonym for Monticulipora 

 onealli. 



His Chetetes rhombicus is abandoned as a S3 r nonym for Monticu- 

 lipora quad rata. This I did in my Catalogue of PaUeozoic Fossils, see 

 p. 48. 



Monticulipora clavicoidea is recognized as a species, and referred 

 to his subgenus Monotrypa. The same disposition is made of Monti- 

 culipora calceola. 



A form closely related to Monticulipora ly coper don is described as 

 Monticulipora petasiformis, and referred to the subgenus Monotrypa. 



Chetetes discoideus is now called Monticulipora (Monotrypa) dis- 

 coidea. 



Chetetes clathratulus is abandoned as a synon3'in for Monticulipora 

 pavonia of D'Orbign} r . He says, " This beautiful form presents a con- 

 siderable superficial resemblance to Ptilodictya, and has been referred 

 to this genus. It wants, however, the definitely circumscribed and 

 peculiarly marked lateral margins of the fronds of this polyzoan type, 

 and what is more important, it is without the peculiarly striated central 

 lamina of the Ptilodictyai. It is true that the bases of the corallites in 

 M. pavonia, D'Orb., are so united with one another as to give rise to 

 an irregular calcareous membrane, which separates the two halves of 

 the corallum; but none of the specimens that I have seen exhibit any 

 tendency to split along the line of this membrane, nor can the coral- 

 lites be forcibly removed from one side of it, exposing the median 

 lamina as a definite structure. In both these respects the Ptilodictyai 

 would show quite different phenomena." 



In 1860, Dr. Prout* founded the genus Cyclopora for certain Bryozoa, 

 and described the species under consideration as Cylopora jamesi, as 

 follows : 



k ' Polyzoum, a fragment showing mostly the sole, with chalices super- 

 posed upon both faces on certain parts of the specimen; sole formed of 

 more or less concentric ridges, bent or erratic at times, crossed by 

 delicate striae, or lines, the intervals between which appear like long, 



•■' Trans. St. Louis Acad. Sci., p. 574. 



