88 PROCEEDINGS OF THE NATIONAI. MUSEUM. vol. 61. 



poorly preserved specimens. Most often these are large, free, multi- 

 lamellar, more or less expanded masses, for -which the name Semi- 

 multelea was proposed by D'Orbigny in his zoarial classification. 



Our specimens show the same general characters, but they are 

 globular or subcylindrical and some portions of the surface are 

 a little better preserved, permitting us to observe the principal 

 external characters. 



The apertures are ogival and surrounded by a thin, little salient 

 peristome. The facettes are smooth, convex, sometimes separated by 

 a salient thread. 



The eleocellaria are quite large, more or less broadly spatulate at 

 their distal extremity. They are not rare, although Goldfuss does 

 not mention them. 



The zoarial lamellae seem to be formed of suborbicular colonies 

 coalescing irregularly. 



Occurrence. — Cretaceous (Cenomanian) : Essen, Germany. 



Plesioty pes. —Cat. No. 68939, U.S.N.M. 



CYCLOCITES, new genus. 



The tubes are expanded at their recurved extremity. Their gem- 

 mation is dorsal around a bundle of cylindrical tubes with regular 

 peripheral gemmation. The orifice of the facette is circular. 



Genotype. — Gyclocites pAmogenitwrn.^ new species. Bathonian. 



This genus differs from M eliceritites Roemer, 1840 in the circular 

 form of the aperture. There is no eleocellarium nor is there an 

 oeciostome. 



CYCLOCITES PRIMOGENITUM. new species. 



Plate 15, figs. 9-12. 



Description. — The zoarium is formed of anastomosing, ramifying, 

 cylindrical branches very diverging in their relation to each other. 

 The facettes are little distinct, flat, separated by a furrow of little 

 depth. The aperture is orbicular, placed anteriorily on the facette. 

 The peristome is thin and very little salient. The tubes of the cen- 

 tral bundle are long, cylindrical, rectilinear, with regular peripheral 

 gemmation. The lateral tubes are horn shaped, much expanded and 

 recurved almost at right angles at their extremit3\ The ovicell is 

 large, pyriform, convex; the oeciopore is orbicular. 



I Diameter of branches 2.5 mm. 



Diameter of the facettes .25-0.30 mm. 

 Diameter of apertura .13- .15 mm. 



Variations. — The facettes which are very fragile, disappear very 

 easily, and the tubes are then terminated by a large irregular orifice. 



