DESCRIPTIONS OF SPECIES. 183 



tinuous across several growth segments, or the new may be so introduced 

 that the striae (trabecular lines) of a succeeding growth segment may alter- 

 nate in position with those of the preceding. Both conditions are connnon. 

 In the spongy zone is a line of trabecular divergence; interior to it the trabec- 

 ulse pass upward and inward ; exterior to it the trabeculse appear horizontal. 

 The margins of the septa where perfect were entire. The whole struc- 

 ture of this species of Eupsammia is the same as in Balanophyllia, except 

 in the comparatively insignificant detail ah'eady mentioned. 



Eupsammia conradi nom. iiov. 

 PI. XXI, figs, 10 to 10b. 



1843. Turbinolia pileolus Conrad. Proc. Acad. Nat. Sci. Phila., Vol. I, p. 327. 

 1840. Turbinolia pileolus Conrad. Proc. Acad. Nat. Sci. Phila., Vol. Ill, p. 22, pi. i, 

 fig. 26. 



1895. Eupsammia ? pileolus Vaughan. Johns Hopkins Univ. Circ, Vol. XV, p. 6. 



1896. Eupsammia f pileolus Vaughan. Bull. U. S. Geol. Survey No. 141, p. 90. 



non Turbinolia jnleohis Eichwald. Zool. Spec, Pt. 1, 1829, p. 186, pi. iii, Qg. 1. 



Shape like a very short cylinder set on a hemisphere. The basal por- 

 tion is very slightly conical, rounded. Very faint costse. Wall thick vesic- 

 ulate. Septa thick, in four cycles; those of the fourth cycle fuse to the 

 sides of the third, near the wall. The first three cycles reach the columella. 

 Sides granulate; columella vesiculate. Greater diameter, 13 mm.; lesser 

 diameter, 11.3 mm.; height, 11 mm. 



Locality. — Pamuukey River, Kent County, Virginia. 



Type specimen. — Philadelphia Academy of Natural Sciences. 



We know but little of this species; only one specimen seems to have 

 been found, and that is very unsatisfactory. I have referred it to the genus 

 Eupsammia, because of the strong resemblance of its septal aiTangement to 

 that of young forms of other species. There is a faint scar on the base, 

 which mav be due to attachment in its early stages. More information con- 

 cerning this interesting little form will be welcomed. 



Genus EHECTOPSAMMIA gen. nov. 



The character of the wall, septa, etc., is typical of the family Eupsam- 

 midse. 



Corallum simple, firmly attached by a short pedicel ; flaring out above 

 the pedicel, witli thin wings on the edges of tlie larger specimens. Wall 



