458 



Dr. J. W. Gregory on new Species of 



AJfinities. — This species is most nearly allied to Glado- 

 phyllia crassilamella, From.*, from the Neocomian of Moran- 

 court. From that form it differs by having more numerous 



Fig. 1. 



Transverse section across two corallites. x 6 diam. 



septa, and especially by the coarse dentation of the septa. 

 The strong " columellar septum " is similar to that of 

 Pleurosmilia. 



2. Prionastrcea Vaughani^ sp. n. 

 (From the Eocene of Alabama.) 



Diagnosis. — Corallum subarborescent, in simple cylindrical 

 branches. Walls thin. Calices deep, elliptical in shape. 

 Rims distinct, separated by shallow grooves. Corallites 

 mostly pentagonal ; occasionally quadrangular or hexagonal. 

 Septa about five orders, of which two or three unite 

 with the large columella. The septa are dentate ; on the 

 upper margin and laterally they are covered by short sharp 

 spines. 



Dimensions. — 



Diameter of branch 17 ram. 



„ corallite -4-5 „ 



„ columella I'O ,, 



Depth of the calice 2 „ 



• E. de Fromentpl, Pal. frnn«;. Terr, exit., Zooph. pt. 8, 1870, pi. xciii. 

 fig. 1, pt. 0, 1873. p. 417. 



