DESCRIPTIONS OF SPECIES. 67 



Specimens 1 to 3 are the types, and ax'e in the United States National 

 Museum; 4 to 6 are in the collection of the Academy of Natural Sciences of 

 Philadelphia. 



The outer sm-face of the corallum is covered by a smooth, polished 

 epitheca; costae may be absent or very slightly developed. In the latter 

 case they are low, usually flattish, and correspond to the intercostal areas. 

 The septa in the upper part of a corallum are thin ; in the lower portion 

 they have undergone some secondary thickening, but apparently not to so 

 great an extent as in some of the other species, viz, F. cuneiforme var. pachy- 

 phyllum or F. remondianum. The actual number of septa in an adult calice 

 can not be made out with certainty because of the infilling of the calices 

 with foreign material (glauconitic sand) and the decomposition of the septa- 

 There are about 70. PI. IV, fig. 10, represents a cross section of a coral- 

 lum. Its dimensions are : Greater diameter, 13 mm.; lesser diameter, 7 mm. 

 The free margins of the septa show transverse undulations; septal faces 

 granulate. Columella quite poorly developed, false. 



Locality. — "Upper part of second bed of green sand of Cook, or lower part 

 of the third, Williams', Squankum, New Jersey." (Meek and Hayden.) The 

 specimens in the Academy of Natural Sciences of Philadelphia bear on the 

 accompanying label only "New Jersey." 



Horizon. — Shark River beds — probably Claibornian. 



Types. — United States National Museum. 



This species seems to have as its nearest relative some of the varieties 

 of F. cuneiforme. Its surface is much smoother, the costse being much less 

 developed, and none of tlie specimens that I have seen show any marginal 

 wings. 



FLABELLUM REMONDIANini Gabb. 

 PI. IV, figs. 5 and 6. 



1864. Flabellum remondianum Gabb. Geol. Surv. of California, Paleontology, Vol. I, 



p. 207, pi. xxvi, fig. 199. 

 1893. Flahelhim remondianum Boyle. North Amer. Mesozoic Invert. : Bull. U. S. Geol. 



Survey No. 102, p. 127. 



1896. Flabellum remondianum Vaugban. Seveuteenth Ann. Rept. U, S. Geol, Survey, 



Pt. I, pp. 1036-1037, pi. Ixiii, flgs. 1 and 2. 



1897, Flabellum remondianum Merriam. Journ, Geol,, Vol, V, pp, 770, 773, 



The following is Gabb's description: "Polypidom triangular, convex 

 on the sides, acute and sti-aight on the lateral margins; sides marked by 



