Protozoa of the Cincinnati Group. 245 



tions by different authors. It was originally described as a plant; 

 then grouped with the corals; Prof. Hyatt, in 1865, called it a 

 mollusk allied to the Cephalopoda, and in 1884 considered it as 

 one of the Foraniinifera. 



Genus I. BEATRICEA, Hillings. [857. 



Kept. Prog. Geol. Sur , Canada, 1852 56; Toronto 1857, jj. 

 ^43. ; A. Hyatt, Jr., 1865 Am. Jour. Arts and Sciences, 2d Series, 

 XXXIX, p. 261 et scq. , Pr(j. .Am. Asso. Adv. Sci., XXXH, 

 (1884), p. 492. 



Nearly straight, one to fourteen inches in diameter, perfo- 

 rated by a cylindrical and nearly central tube, which is trans- 

 versely septate ; outside of lube composed of numerous concentric 

 layers. 



1. B NoiJULOSA, Hillings, 1857. 

 Loc. lit. p. 343. 



Surface covered with oblong, oval, or sub-triangular projec- 

 tions one to three lines high, with rounded, l)lunt poin'.s nearer one 

 end of the prominence than the other; projections varying in size, 

 sometimes with a nearly circular base, sometimes six or seven lines 

 long and one-half as wide, distant one to three lines from each 

 other, arranged in rows or spirals; whole surface fretted with 

 minute points, showuig perforations when worn. Septa thin, very 

 concave, one line to one inch apart. 



Locality. Originally described from Canada. Found in 

 Marion County, Kentucky. 



2. B. UNDUJ,A']-A, Billings, 1857 

 Loc cit. p. 344. 



Surface sulcated longitudinally by short, irregular, wave-like 

 furrows, from two lines to one inch across; otherwise like the ])re- 

 ceding. Specmiens have been found ten feet five inches long and 

 from eight to fourteen inches in diameter. 



Locality. With the preceding. 



These two species have, by some writers (Knott, Geology of 

 Marion County — Kentucky Geological Survey, p. 32) been con- 

 sidered one species. Prol. Hyatt, however, considers them dis- 

 tinct, and says they can be separated by the internal characters. 



