652 Scientific Proceedings^ Royal Dublin Society. 



Brachiopods : — 



Productus aciileato-fimbriatus. 



„ margaritaceus, Phil. 



„ cf. mesolobiis, Phil. 



„ doulaghensis, Vau. (St. Doulagh's form). 



,, cf. concinnus, Sow. (cf. St. Doulagh's form). 

 Chonetes cf. hardrensis, Phil. 



„ sp. (? early papilionacean). 

 Orthotetid (ornament as in St. Doulagli's form). 

 Leptaena sp. 



Athyris glahrlstria, Phil, (near type). 

 Spiriferina cf. octoplicata, Sow. 

 Martinia pinguis, Sow. 



„ rotundafa, Sow. 

 Reticulnria cf. reticulata, M'Coy. 

 Spirifer cf. attenuatus, Sow. 



„ aff. clathratus, M'Coy. 



,, cf. convolutus, Phil. 

 Syringothyris cuspidata, Mart. 

 Schizophoria resupinatn. Mart. 

 Dielasma cf. hastattim, Sow. 

 Pugnax ef. pugnus, Mart. (St. Doulagh's form). 

 ' lUiynchonella ' cf. platyloha, Sow. 

 Camarophon'a pleicrodon, Phil. 

 Orhiculoideu sp. 



Push Slates, upper (E 6, 7, 8), and Rush Conglomerate Series, 

 LOWER (R9, 10 b, 10 c) = C,. 



The chief elements of the fauna of the Slates continue into the lower 

 Conglomerates. The most marked faunal change seems to occur above 

 PlOc. Here, for instance, Zaphreiitis ambigua and Caninia cormicopiae, so 

 jjlentiful below, cease to be found. Here, too, Mkhelinia megastoma first 

 appears. This level has therefore been taken as the base of Cj. P 6 has 

 been fixed as the lower limit (7) of C, for the following reasons : — 



1. The earliest trace of a vesicular Caninid occurs here. 



2. Syriiigothyris cuspidata, Martinia pinguis, Martinia rotundata, Productus 

 doulaghensis, Pugnax ef. pugnus (St. Doulagli's form), &c., are Ci shells. 



3. Zaphrentis delanoui (typical form) is not known above 7. 



4. There are no traces of large Chonetes. 



