New Species of Cladophyllia, Prionastrgea, and Stylina. 457 



at the tibio-tarsal articulation ; belly areolate. Pale brownish 

 above, with a large cross- shaped (>4<) marking from be- 

 tween the eyes to the sacral region ; a dark canthal streak ; 

 upper lip with vertical dark bars ; limbs with very sharply 

 defined oblique dark brown cross-bars ; lower parts brownish, 

 much marbled with dark brown. 



From snout to vent If '^'im. 



A single specimen fro., i"". ivenir, Bolivar, 5800 feet. 



LIII.— iV^ew Species 0/ Cladophyllia, Prionastraea, ant^ 

 Stylina. By J. W. Gregory, D.Sc, F.G.S. 



1. Cladophyllia Birleyce, sp. n. 

 (From the Atherfield Clay.) 



A few years ago Miss Birley lent me a coral which had 

 been collected by herself and Miss Copeland from the Ather- 

 field Clay of the Isle of Wight. A section was cut, but 

 showed no trace of internal structure ; and Miss Birley 

 kindly allowed me to retain the specimen until a more con- 

 venient time. Some further sections have recently been 

 prepared, and they fortunately show the structure and 

 affinities of the coral. 



Diagnosis. — Corallum a large crowded hemispherical tuft. 

 The branches are cylindrical, fairly thick, and sinuous; they 

 dichotomize repeatedly. Calices circular, shallow. 



Septa coarsely dentate, and some appear to be slightly 

 cribriform. The septa occur in four complete cycles. One 

 septum is continued across the centre of the corallite, where 

 it expands ; in some corallites trabecule from other septa unite 

 with this larger septum, giving the appearance of a parietal 

 columella. Dissepiments scanty. 

 Dimensions. — 



Diameter of corallum . . . 75 by 85 mm. 

 Height „ „ ... 50 mm. 



Diameter of corallite . . . 3-5 „ 

 „ „ calice .... 2 „ 



Depth „ „ 1 „ 



Number of septa Up to 48 



Distribution. — Atherfield Clay, Atherfield, Isle of Wight. 

 Coll. Miss Birley. 



