64 THE HAMILTON ASSOCIATION. 



acquainted with some particular branch to which he had devoted 

 special attention, but as a general Palaeontologist he had no superior. 

 James Hall, Albany : Royalty never conferred a higher honor than 

 such a name as your own. 



FAMILY FENESTELLID^, BY PROF. SIMPSON. 

 B7-anches connected by dissepiments Infundibuliform. 



Fenestella — Cells in two ranges separated by Carin?e, or row of 

 nodes. 



Polyporella — Cell aperture in two or three ranges, branches cari- 

 nated or not. 



Polypora — Cell apertures in three or more ranges, no Carina. 



Fenestralia — Cell apertures in four ranges, Median Carina. 



Fenestrapora — Cell apertures in two ranges, Carina prominent, 

 reverse poriferous. 



Cycloporina — Cell apertures in two ranges, Carina with prominent 

 semi- circular projections. 



Hemitypa — Cell apertures in two ranges, Carina prominent, con- 

 nected by Scalse meeting midway, Sendo-Carinre. 



Unitypa — Cell apertures in two ranges, Carinae prominent, con- 

 nected by oblique thin plates. 



Isotrypa — Cell apertures in two ranges, Carinse connected by bars, 

 reverse face poriferous. 



Tectuliporella — Cell apertures in two ranges, Carinse connected 

 with bars, reverse face not poriferous. 



Tectulipora — Cell apertures in two ranges, branches and dissepi- 

 ments carirated, Carinae prominent, expanded at top and 

 coalescing. 



Loculipora — Cells arranged in oval order around fenestrulis, 

 branches and disseppiments carinated, Carinse prominent, 

 expanded at top, coalescing. 



Phyllopora — Cell in two ranges, dissepiments celluliferous. 



Septopora — Cell apertures in two ranges, branches carinated, dis- 

 sepiments celluliferous. 



Syncladia — Cell apertures ' in more than two ranges, dissepiments 

 arcuate and celluliferous. 



