SECONDARY AND TERTIARY FORMATIONS OF NORTH AMERICA. 165 



Fam. FASCIGERID^E. 

 FILIFASCIGERA, d'Orb. 



Colony filiform, encrusting, cellules arranged in fascicles, placed only on one line, 

 disposed regularly never scattered. 



Encrusting like Reptofascigera and Lopholepis, this genus is distinguished from the 

 first by the fascicles not being in two lines and alternating, nor placed irregularly as 

 in the second. 



F. .AIEGAERA, fig. 53. 



Id, d'Orb. 



Tubulipora id., Lonsdale, Quart. Jour. Geol. Soc. Lond., vol. 1, p. 69. 



Colony very minute, encrusting, filiform. The attached portion is very much 

 flattened, highest in the middle and sloping convexly to the edges. Cellules fascicu- 

 late, three or four in a bundle, club-shaped at the top, in one instance bifurcate. The 

 tube rises at nearly a right angle from the body, sometimes inclined a little forwards. 

 There is often a slight constriction of the decumbent portion of the colony, in advance 

 of the fascicule of cellules. 



This species is rare. We have only observed two small colonies from Timber Creek, 

 N. J. Cretaceous. 



Lonsdale seems, from his figure to have studied a worn specimen. Both of ours 

 show the extremities of the tubes in several instances. 



Fam. FASCIPORIDJE. 

 FASCIPORA, d'Orb. 



Colony testaceous, entire, arising from a fixed base, from which arise free dichotomous 

 branches. Cellules fasciculated, fascicules placed at the extremities of the branches. 

 The accessory or " intermediate " pores covering the sides of the branches, usually 

 much more distinct than the true cellules. 



The isolation of the groups of cellules at the extremities of the branches, instead of 

 their being confluent, at the edge of a meandriform plate separates this genus from 

 Fasciporina. The tubular cellules on the walls of the branches, instead of perforations, 

 distinguishes it from Corymbosa, 



F. Americana, n. s., fig. 54. — Colony composed usually of robust clavate branches, 

 sometimes slender and tortuous. Cellules collected into well defined bundles at the 

 extremities of the branches, often crowded. Fascicles convex above ; dividing walls 

 between the cellules distinct. Lateral tubes prominent, exsert, often arranged in 

 regular longitudinal lines with well marked space- between them; rarely so close 

 together as represented in the figure Opening round. These tubes are often reduced 



