﻿Yol. 64.] CAEBONIFEROTJS LIMESTONE OF THE MIDLAND AREA. 45- 



Brachiopods : 



Dielasma hastata (Sow,). 

 Seminula amhigua (Sow.). 

 Athi/ris cf. expansa (Phil.). 

 Athyris cf. glahristria (Phil ). 

 Athyris j)lccnosulcata (Phil.). 

 Athyris cf. lameUosa (L'Eveille). 

 Martiiiia glabra (Mart.). 

 Marti7iia lineata /'Mart.). 

 Martinia ovalis (Phil.). 

 Spirifer bisidcatus, Sow. 

 Spirifer afF. grandicostatus, M'Coy. 

 Spirifer dwplicicosta, Phil. 

 Spirifer integricosta, Phil. 

 Spirifer pinguis. Sow. 

 Spirifer planicosta (M'Coy). 

 Spirifer siriaius (Mart.). 

 Syringothyris ciispidata (Mart.). 

 Camarophoria crumena (Mart.). 

 Fugnax acuminatus (Mart.). 

 Tugnax pugnus (Mart.). 

 Leptcena analoga (Phil.). 

 Orthothetes cf. crenistria (Phil.). 

 Rhipidomella aflF. Michelini (L'Eveille). 

 Schizophoria resupinata (Mart.). 

 Froductits corrugatus, M'Coy. 



ProdMctus corrugato-hemisphericus. 



Prodicctits hemisphericus, Sow. 



Prodtichcs giganteus (Mart.). 



Productus longispinus, Sow. 



Product lis aff. lobatus, Sow. 



Proditctus aff. setosus, Phil. 



Productus concinnus, Sow. 



Productus 3Iarti//i, Sow. 



Productus st'jnireticulatus (Mart.). 



Productus costatus, Sow. 



Productus muricattis, Phil. 



Productus scabriculus (Mart.). 



P7'oducius pustulosus, Phil. 



Productus fimbriatus. Sow. 



Productus punctcuo-fimbriatus, includ- 

 ing Pr. elegans, M'Coy. 



Productus puncfatus (Mart.). 



Productus aculeatths (Mart.). 



Productus spiriutos'us, Sow. 



Productus inesolobus, Phil. 



Productus plicatilis, Sow. 



Chonetes cf. crassistria (M'Coy), 

 Vaughan. 



Chonetes comjyressa, nom. nov. 



Daviesiella aff. comoides (Sow). 



Diagnosis: — 



The extent of this subzone in the typical section is defined 

 by the range of Lonsdalia. Lonsdalia Jloriformis iSinges through- 

 out, but L. duplicata has been found to occur only in the upper 

 beds. Characteristic features of the subzonal fauna, in its typical 

 development, are as follows : — The occurrence of Lonsdalia 

 Jioriformis and Cyathopliyllum regium. The abundance of Litlio- 

 strotion junceum and of a LitJiostrotion intermediate in characters 

 between L. irregulare and L. Martini. The common occurrence 

 of LitJiostrotion Martini and L. aif. PortlocJci^ associated with 

 L. aff. M'Coyanum. The great variety of the simple Clisio- 

 phyllids, certain groups of which frequently attain extreme 

 abundance. An enormous abundance of Productus giganteiis 

 and variants, and the very common occurrence of Productus con- 

 cinnus, Pr. Martini, and Pr. semireticulatus, in association with 

 Productus punctatus, Pr. scabriculus, Spirifer hisulcatus, Sp. 

 planicosta, and Martinia glabra. 



Analysis of Taunal Characters: — 



Corals: 



Lonsdalia jioriformis, although generally distributed, is not 

 often abundant. L. duplicata occurs locally in the upper beds. 



Cyatlio'pliyllum regium is common. Simple Cyathopliylla, 

 having a widely-conical form and a partly-tabulate central 



