120 THE PALEONTOLOGY OF MINNESOTA. 



[Beremoea. 



tain, Manitoba. My belief that it will yet be found at Spring Valley, Minnesota, and 

 other points in the southern part of the state, where equivalent beds are exposed, is 

 therefore within the bounds of probability. 



Mus. Reg. No. 8102. 



Genus BERENICEA, Lamouroux. 



Berenicea (part.), Lamoukotjx, 1821. Exp. meth. des genres de pol., p. 80. 

 Bosacilla, F. A. Eoemer, 1840, Verst. des norddeutsch. Kreidegeb., p. 19. 

 Berenicea, d'OKBiGNT, 1852. Pal. Fr. terr. cret., t. v, p. 858. J. Haime, 1854, Bry de la form. 



Jurass., p. 19. Ulbich, 1882, Jour. Gib. Soc. Nat. Hist., vol. v, p 194, 



and 1890, Geol Sur. 111., vol. viil, p. 368. 

 Diastopora, d'OKBiGNY, 1850, and Busk and other English authors. (Not Lamouroux.) 

 Z)iastqpom (part.), Hincks, Vine and others, 

 Saganella, Hall, 1852. Pal. N. Y., vol. ii, p. 172. 

 Diastoporella, Vine, 1883. Brit. AsSoc. Eep. Foss. Pol., iii; and Proc. Yorks. Geol. Soc, n. s., vol. ix, 



pt. ii, p. 190. 



Zoaria incrustiug, forming circular or irregular patches. Individual zooecia as 

 in Sfomatopora and Prohoscina, but contiguously arranged in more or less regular 

 spreading series. 



Type : B. diluviana Lamouroux. 



JFor remarks relating to this genus see under Stomatopora. 



Berenicea minnesotensis TJlrich. 



PLATE I, FIGS. 25, 27 and 29 ; PLATE II, FIG. 1. 

 Berenicea minnesotensis Uleich, 1886. Fourteenth Ann. Eep. Geol. Nat. Hist. Sur. Minn., p. 58. 



Zoarium forming exceedingly thin, irregular crusts upon foreign bodies. The 

 crust may be entire, with irregularly distributed and unequal non-celluliferous spots, 

 or, especially at the edges of large expansions, it may throw off broad branches and 

 include "a few open spaces. In one example, provisionally referred here, the latter 

 are so large and conspicuous that the zoarium may well be described as consisting of 

 wide, irregularly inosculating branches.* Ordinarily the crust is nearly entire, and 

 the non-celluliferous spaces, which, like the rest of the surface between the zooecial 

 apertures, are marked with obscure transverse lines or wrinkles, constitute a con- 

 spicuous feature. Zooecia more or less immersed, in the latter condition appearing 

 as subelliptical convex spaces, about 0.2 mm. wide, with an oblique circular aperture, 

 0.13 mm. in diameter, at their upper ends. In such examples (see fig. 29) the aper- 

 ture is scarcely produced, but in others, more matured, it is prominent, while all the 

 remainder of the cell is completely immersed. The arrangement of the zooecia is, 



*Perliaps this specimen Is to l)e CDusidered as indicating a departure that later on resulted in Probosnina tumuloso of this 

 worlc. 



