JfiO MONOGRAPH OF THE FOSSIL TOLYZOA OF THE 



diameter of the mass of cellules. Whether the character is constant with the species, 

 remains to be seen. All Ave have seen of the species is on a single shell encrusting in 

 two or three patches. It seems to be rare, since in examining over a hundred shells 

 from this locality we only found the one specimen from which this description is 

 taken. 



M. Califoknica, n. s., fig. 46. — Colony encrusting, cellules arranged in lines, not al- 

 Avays in regular quincunx. Cellules pyriform, sometimes continued behind, often 

 abruptly truncated. Opening large, occupying two-thirds or more of the cellules; 

 varying from rounded triangular to oval, usually narrowest in front, never sharply 

 acuminate. Surface sometimes rounded about the oval opening, at others carinate, 

 midway between the aperture and the margin of the cellule, from which line the sur- 

 face slopes downwards, convexly in both directions. Behind the opening the surface 

 is convex, often narrow. No abortive cellules nor ovarian vesicles were observed. 



This species resembles in some of its characters, M. abortiva, but independently 

 of its belonging to an entirely different geological formation, it is distinguished by the 

 cellules being proportionally shorter and the aperture being much larger. The cellule 

 is not so convex, and the walls around the aperture partake to some extent of the 

 characters of a thickened lip, being abruptly descending behind the mouth, before the 

 convex portion of the surface is reached. We noticed in one cellule, a constriction 

 of the aperture, or a solidification of the membrane similar to that exhibited in M. 

 abortiva, but in this case, the mouth was not margined by the little lip, and the sur- 

 face was closely marked by concentric lines. 



Locality. — Santa Barbara, Cal. Miocene. 



M. Barbarensis, n. s., fig. 47.— Colony irregularly encrusting. Cellules regularly 

 oval, juxtaposed. Opening of the same shape as the cellule, occupying nearly the 

 whole surface. Margin simple, plain, slightly convex exteriorly, ending abruptly at 

 the inner margin. 



Locality. — Santa Barbara, Cal. Bare. 



We can add nothing to the above description. The specimen consists of a mere 

 series of oval or elliptical rings, without markings or ornamentation of any sort as will 

 be seen by the figure. 



FLUSTRELLIDJE. 



FLUSTBELLA. 



Colony in free branches, cellules all round. Cellules placed in longitudinal lines or 

 quincunx ; never in more than one layer. Opening large and provided with one 

 special pore. 



This genus can be distinguished from Biflustra by the presence of the pore and from 

 Escharmella and Porina by the large opening. 



