Apr. 1899. Paleontology of Upper Cretaceous Series — Logan. 215 



FUSUS sp. 

 (PI. XXV, Figs. 2 and 5. Mus. No. P 5942.) 



The shells of these specimens are entirely absent and a specific 

 determination is not warranted upon evidences such as are presented 

 by casts alone. The reader is asked to compare the figures of these 

 specimens with the figures of Fusus staminea, Conrad. The forms rep- 

 resented here were found associated with Rostellites, and the above 

 described species. ' 



ASTROCCENIA CONICA, n. sp. 

 (PI. XXVI, Figs. 1, 2 and 3. Mus. No. P 5946.) 



Corrallum tuber-like, about the size of a medium-sized orange; 

 corallets inversely conical, not greater than 8mm. in diameter, calices 

 of the corallets of moderate depth, six sided but not always distinctly 

 so, with moderately thin interstices but bordering each other; colu- 

 mella distinct but not prominent; intersection of dissepiments and 

 septae forming prominent carinae; vertical septae extending more than 

 half the distance to the columella, the secondary ones only about half 

 the length. Specimen somewhat weathered so that generic charac- 

 ters are doubtful. 



This specimen is interesting as being the only species of coral as 

 yet described from the Benton of the Interior Cretaceous. It was 

 collected by the writer from the Lincoln Marble horizon on Rattle- 

 snake creek in Mitchell County, Kansas. 



PSEUDO-PERNA WILSONI, n. sp. 

 (PI. XXVI, Figs. 4 and 5. Mus. No. P 5945.) 



Shell thin, capacious, triangular in general outline with short 

 beaks turned slightly toward ventral border, and fitting closely. 

 Lower valve thick on the margins, thin centrally: not as capacious as 

 upper valve and nearly flat on the adhering surface; fluted on margin 

 in some specimens, and lacking the symmetry of outline noted in 

 upper valve; ventral border possessing a triangular excursion near 

 the central portion; dorsal border, concave; posterior border, convex. 



Upper valve, flat or nearly so on postero-ventral wing, convex in 

 general; ventral margin in region of beak crossed by slight ridges of 



