548 ME. E. B. L. DIXON AND DE. A. VAUGHAN ON [Nov. I9II, 



S 2 : 



Eastern District : Longland to Mumbles section (6) ; 

 Bishopston Valley (8). 



South-Western District: Overton (2). 



The Lower (cherty) part abounds in silicified clusters of a large 

 Liihostrotion — L. affine (Elem.) Ed. & H. Seminula and Productus 

 fill recurrent bands. Gasteropods are numerous. 



The Upper (oolitic) part contains a fauna characteristic of the 

 S„ subzone throughout the South- Western Province. Bands 

 crowded with Seminula, Liihostrotion, or Productus corrugato- 

 hemisphericus recur again and again. 



Fauna of Upper S 2 : 



Corals : — 



Syringopora — 6. 



Alveolites— 6. 



Lithostrotion martini Ed. & H.. and varieties. — 2, 6, 8 (very abundant). 



Carcinophyllum 9 Vaughan — 6, 8. 



Brachiopods : — 



Productus hemisphericus Sow. — 2, 6, 8. 



Productus corrugato-hemisphericus including ' P. cora, mut. S 2 ,' 



Vaughan — 2, 6, 8 (very abundant). 

 Papilionaceous Chonetes — 6, 8. 



Seminula ficoides Vaughan and varieties. — 2, 6, 8 (very abundant). 

 Seminida cf. ambigua Sow., an S 2 form — 2. (Collected by the late 



Dr. W. B. Gubbin ; see ' Bristol Paper,' p. 235.) 



Gasteropods : — Bellerophon—Q. 



D IBUNOPHYLLUM ZONE (D). 



D i: 



Eastern District : Pwll-du (5) ; Limeslade Bay (6), and 

 Mumbles Head (6 a) ; southern end of Colts Hill (Oystermouth) ; 

 Bishopston Valley (8). 



South-Western District: Port Eynon (3). 



Corals: — 



Syringopora geniculata Ed. & H.— 3. 

 Alveolites septosa (Flem.) Ed. & H. — 5. 



Zaphrentis ambigua Carrutbers (?) — a unique specimen from (3). 

 Campopliyllum aff. murchisoni Ed. & H. — 6, 6 a, 8, 3. 

 Clisiopbylloid Campopliyllum— 5, 3. 



Cyathophyllum murchisoni Ed. & H.--5, 3, 8, 6 a (extremely abundant). 

 Lithostrotion martini Ed. & H., and vars. — 5. 

 Lithostrotion junceum (Flem.).— 6 a. 

 Koninckophyllid —6. 

 Dipliypbylloid Cyathophyllum— -3, 6 a. 

 Cyathophylloid Aulophyllum — 8. 



Carcinophyllum Vaugban and a variety convergent with Dibuno- 



phyllum 6 — 5, 6 a. 

 Dibuvophylhim 6 Vaughan, and D. <p Vaughan — 6, 6 a, 5, 3, 8. 

 Dibunophyllum aff. ip Vaughan — 3. 



