300 



BR. A. VATJGHAN ON THE FAUNAE SUCCESSION [May I906, 



following determinations are subject 

 identification. 



to a considerable error of 



Productus cf. Martini ? (Sow.). 

 Chonetes cf. crassistria (M'Ooy). 

 Orthothetes crenistria (Phil.), cf. mut. 



Z. ; and mut. C. 

 Spirifer cf. clatkratus (?) M'Coy. 

 Spirifer cf. ductus, Keys., de Kon. 



Syrinyothyris cf. laminosa (M'Coy) 



(Dav. pars). 

 Athyris sp. (cf. A. Iioyssii, mut. /3). 

 Athyris cf. glabristria (Phil.), and 



variant towards form of A. plano- 



sulcata (Phil.). 

 Camarotcechia (?) 



Correlation of the ' Zaphrentis-~Beds ' with the Upper 

 Zaphrentis-Zone of the Avonian of the South-Western 

 Province. — This correlation rests upon the following facts common 

 to the two developments : — 



(1) The abundance of Zaphrentis cf. Phillipsi ; 



(2) The absence of Cyathophyllum, Lithostrotion, and Clisiophyllids ; 



(3) The absence or rarity of longitudinally-ribbed Producti. 



The abundance of Zaphrentis would indicate the upper division 

 of the Zaphrentis-Zone. 



2. Fauna of the f Michelinia cf. megastoma-Be&s ' ; 

 (R9e to R 11 h). " 

 [The typical characters are not, however, developed until B 10 h.~] 

 (i) Corals: 



Syringopora cf. ramulosa, Goldf. 

 Syringopora cf. reticulata, Goldf. 

 Michelinia cf. megastoma (Phil.). 

 Michelinia (mutation towards 



Bcaumontia). 

 Amplexus sp. 



Densiphyllid. 



Lithostrotion cyathophylloides, sp. nov. 

 Cyathophyllum cf. <p, Vaughan. 

 Carcinophylloid Clisiophyllid. 

 Clisiophyllum aff. curkeenense, sp. nov. 

 (a less-specialized variant). 



The association of Syringopora cf. reticulata, Michelinia cf. 

 megastoma, and Lithostrotion cyathophylloides, in abundance, forms a 

 striking feature of this group of beds. Of these three corals, the two 

 first-mentioned are confined to this zone, and the last of the three 

 is only doubtfully represented in the Cy a thacconia -Beds. 



considerable error of identi- 



Orthotketes. 



Spirifer cf. slriatus (Martin). 

 Syrinyothyris cf. laminosa ? (M'Coy). 

 Athyris cf. glabristria (Phil.). 

 Athyris cf. expansa (Phil.). 

 Seminuloid Athyrid. 



(ii) Brachiopods (subject to a 

 fication) : 



Productus cf. concinnus (Sow.). 



Prod,uctus cf . fimhriatus. 



Small Chonetes (possibly young 



papilionacean). 

 Large Chonetes (convex papilionacean). 

 Schizophoria resupinata (Martin). 



Correlation of the ' Mecjastoma-lr\eo\^'' with the Syrin- 

 gothyris- and Lower Seminnla-Z ones of the Avonian of 

 the South -Western Province. — This correlation rests upon 

 the following facts : — 



(1) Michelinia cf. megastoma and Syringopora, cf. reticulata are, in the South- 



western Province, confined to G and S T , of which zones they are charac- 

 teristic. 



(2) Lithostrotion is rare at the top of C. and becomes abundant at the base 



of S r 



