322 CRETACEOUS PALEONTOLOGY. 



Genus FILISPARSA d'Orbigny. 



Filisparsa contortilis (Lonsdale). 

 Plate XXII., Figs. 5-7. 



1834. Retepora Mort, Synop. Org. Rem. Cret. Gr. U. S., p. 79. 

 1845. Idmonea contartilis'Lons., Quart. Jour. Geol. Soc. Lond., 



vol. i, p. 68, figs. a-d. 

 1862. Idmvnea contortilis G. & H., Jour. Acad. Nat. Sci. Phil., 



2d ser., vol. 5, p. 167. 

 1864. Idmonea contortilis Meek, Check List Inv. Foss. N. A., 



Cret. and Jur., p. 4. 

 1868. Idmonea contortilis Con., Cook's Geol. N. J., p. 723. 



Description. Zoarium consisting of more or less contorted, 

 flattened, dividing and anastomosing branches from .5 mm. to 

 i mm. in width, with zooecal apertures on one side only, the 

 reverse side being flattened or slightly convex and marked by 

 transverse wrinkles which are curved forward in the middle, and 

 in somewhat worn specimens marked also by longitudinal lines 

 which indicate the lateral boundaries of the zocecia. Zocecia more 

 or less irregularly arranged, the apertures sometimes in short 

 transverse rows, and again scattered irregularly, sometimes ab- 

 sent from considerable areas of the surface, usually about .1 mm. 

 in diameter; the terminal portion of the zooecia free, cylindrical 

 and inclined slightly forward, the procumbent portion rounded 

 and bounded laterally by longitudinal furrows upon the surface 

 of the zoarium. 



Formation and locality. Vincentown limesand, Vincentown 

 (154), Timber Creek and near Mullica Hill (Gabb and Horn). 



Geographic distribution. New Jersey. 



Filisparsa bifurcata Ulrich and Bassler n. sp. 

 Plate XXII., Fig. 8. 



Description. Zoarium consisting of somewhat flattened dich- 

 otomously dividing branches from .5 mm. to 1.2 mm. in width. 

 Zooecial apertures occupying one side only, the reverse side being 



