SECONDARY AND TERTIARY FORMATIONS OF NORTH AMERICA. 161 



F. capistrata, n. s., fig. 48.— Colony in round or oval branches, with about eight 

 or ten longitudinal rows of cellules, often with a pretty distinct transverse arrange- 

 ment. Cellules subquadrate, placed in contact. Opening large, oval, bordered by a 

 thick prominent lip ; lip usually approaching, at its proximal edge, the distal edge of 

 the preceding one, but always with a distinct groove between them and sometimes a 

 space, half as long as the width of the cellule. Surface of the lip at times regularly 

 convex, occasionally sharp at its outer margin, from which the surface slopes to the 

 edge of the aperture. Special pore, prominent, oval, placed at the upper, right hand 

 corner of the aperture and bordered by an independent raised margin. Occasionally 

 the pores are so arranged as to continue a raised line from the border of one aperture 

 to that of the other, thus causing the appearance of a raised line bounding the longi- 

 tudinal rows of cellules. This is especially the case when the cellules are crowded. 



From the Cretaceous, near Mullica Hill, N. J. Very rare. 



F. ctlindrica, ii. s., fig. 49. — Colony in cylindrical or oval (?) branches with (in the 

 only specimen before us) six longitudinal rows of cellules arranged quincuncially. 

 Cellules divided superficially into two parts ; the anterior portion is convex and oval, 

 with its greatest diameter longitudinal. In the centre of this part, is pierced the 

 aperture which varies from circular to oval, and occupies the median third of the sur- 

 face. The posterior part is flat and is covered by a labiate process, quadrate in out- 

 line, depressed behind and elevated in advance ; superiorly it is truncated so that the 

 opening looks forwards and upwards. This posterior part is nearly or quite as large 

 on the other. No special markings, no ovarian vesicles nor abortive cellules were 

 observed. 



From the Cretaceous, near Mullica Hill, N. J. Only one specimen, showing about 

 three cellules longitudinally, was obtained. 



We had some doubt in referring this species to the above genus, not being fully sat- 

 isfied of the true relations of the labiate process, covering the proximal half of the cel- 

 lule. It is distinctly perforate anteriorly, and being situated in the position occupied 

 by the " special pore " of this family, it probably performed the same function. The 

 oral aperture also seems to be unusually small. Were we to consider the oval portion 

 as constituting the whole cellule, it would not be out of proportion, but this can hardly 

 be, since, were that the case, the cellules would be widely separated. Unfortunately, 

 we have not the means at hand, of solving these questions, since to do so would ne- 

 cessitate the destruction of the only known specimen of the species. 



REPTOFLUSTRELLA, d'Orb. 



Colony testaceous, encrusting, composed of one layer of cellules. Cellules arranged 

 in radiating or longitudinal lines and usually in quincunx. Opening large, closed U\ 

 a membrane in the living state: provided with a •■special pore," usuallj placed 

 hind the opening. 



