DESCEIPTIONS OP SPECIES. 



181 



Coralluin compressed, corneal, straight; cross section elliptical, no 

 indication of attachment. Costa3 rather fine, show perforations; branch 

 by trifurcation. No epitheca. Wall perforate, spongy. Septa thin, in 

 five cycles, anastomosing as usnal in Eupsammia. Columella spongy. 

 Greater diameter of caliee, 12 mm.; lesser diameter of calice, 9 mm.; length 

 of corallum, 13 mm. 



Locality . — Claibome, Alabama. '■ 



The following description was based on material from Greggs Landing, 

 Alabama, in the United States National Museum: " 



Tlie corallum is subconical or subcuneiform, the cross section is ellipti- 

 cal. The base is rather obtuse, usually rounded; very frequently on the 

 tip is a minute scar, sho\\ ing that the corallum, in its early stages at least, 

 is attached. The adults are evidently free, and the basal scar may be 

 obliterated. The coralla are usually straight, but sometimes the apex of 

 the base may be nearer to one end of the long transverse axis than to the 

 other. There is no epitheca. The costie correspond to all septa; they are 

 equal, fine and crowded; they are acute, with beaded margins; nearly 

 always have along the summit a single row of granules; very rarely 

 the row nvAj be double tor a short distance. The septa are thin, weak, 

 arranged in five complete cycles, six systems, with the typical Eupsammid 

 scheme of anastomosing. Tlie granulations on the septal faces are rather 

 low. The columella is lax, spongy, fairly well developed. 



a Represented by PI. XXI, fig. 5. 



The specimens from Virginia are usually more slender than those from 

 Alabama. PI. XXI, fig. 4, represents one of these slender specimens. 



Localities. — Grcggs Landiiig, Alabama; Woods Bluff, Alabama; Potomac 

 Creek, Virginia; Aquia Creek, Virginia; 1 mile southeast of Mason Springs, 

 Maryland. 



'Doubtful. It 1» quite probable that Conrad has assigned a wrong locality to the specimen. 



