554 MR. J. A. DOUGLAS ON THE [Nov. ICJOO^ 



Corals : 



Carcinophyllum aff. mendipense enters at the base, where it is 

 associated with Campopliyllum cylindricum mut. S,. The latter 

 here attains its second maximum, and is enormously abundant 

 locally. 



Lithostrotion martini occurs commonly throughout, appearing, 

 in some localities at the base, in others being absent or extremely 

 rare at this level. 



Syringopora geniculata becomes increasingly important, but 

 S. reticulata is restricted to the lower part. 



Michelinia grandis and Zaphrentis omaliusi var. densa occur 

 locally at- the base, but are never common. 



Campopliyllum cf. caninoides is rare. 



Brachiopods : 



Daviesiella cf. comoides is abundant in the lower part. 



Productus punctatus and var. elegans are not uncommon. 



Productus aff. occurs sparingly. 



Camarophoria isorhyncha is locally common. 



Productus cf. semireticulatus is nowhere abundant. 



Orthotetes aff. crenistria is of common occurrence near the base. 



S 2 = Subzone of Productus aff. cora mut. S 2 (coba subzone). 



Special faunal characters: — 

 Corals : 



Nematophyllum minus is enormously abundant near the summit, 

 forming a well-marked horizon ; it is associated with Carcino- 

 phyllum sp., which genus attains its maximum at this level. 



Syringopora geniculata and S. ramidosa are common, especially 

 in the topmost beds. 



Lithostrotion martini is abundant throughout. 



Cyathophyllum aff. murchisoni occurs sparingly, but is never 

 common. 



Zaphrentis aff. ennisJcilleni was recorded from the summit of 

 this zone. 



Brachiopods : — 



Productus aff. cora mut. S 2 is very abundant locally. 



Dielasma aff. hastatum and Seminula ambigua are common in 

 the topmost beds. Chonetes papilionacea occurs sparingly. All the 

 other brachiopods mentioned in the faunal list are rare. 



The oolitic beds mentioned above are, in some localities, 

 crowded with gastcropods, the commonest genera being Loxonema, 

 Euomphalus, and Straparollus. 



A characteristic bryozoan in this subzone is Hemitrypa. 



