﻿556 ME. T. E. 8IBLY ON THE CARBONIFEROUS [Aug. I905, 



Parts of S 2 are exposed along the top of the escarpment, between 

 the eastern end of the ridge and Hatley Eocks ; and the top of S x is 

 well seen in a small quarry, above the road, 1100 yards east of 

 Kewstoke Parish-Church. A lower part of S x is exposed in another 

 small quarry, 600 yards farther west. 



(3) The Faunal Sequence. 



[Throughout the palaeontological part of this paper I have followed exactly 

 the system of nomenclature employed by Dr. Arthur Vaughan in his paper on 

 ' The Paleeontological Sequence in the Carboniferous Limestone of the Bristol 

 Area' Quart. Journ. Geol. Soc. vol. lxi (1905) pp. 181 et seqq. Forms found in 

 the Weston District, which are not recorded in that paper, are referred to in 

 the notes on p. 557.] 



Syringothyris-Zone. 



No brachiopods or corals have been recorded from the ' laminosa- 

 dolomites ' or from the ' Caninia-0 oliteJ The following lists, there- 

 fore, apply only to the succeeding 450 feet of the zone. 



Coral-fauna : — 



Caninia cylindrica. 



Zaphrentis aff. cornucopics. 



Cyathophyllum <p : occurs throughout : abundant in the upper part. 



Lithostroiion Martini : rare ; recorded at the top only. 



Michelinia megastorna. 



Syringopora cf. distans. 



Syringopora cf. reticulata. 



Brachiopod-fauna : — 



Dielasma sp. 



Seminula aff. jicoidea : occasional in the upper beds. 



prominent in the upper beds. 



Seminula ambigua 



Athyris cf. expansa 



Eeticidaria aff. lineata. 



Sptrifer cf. bisidcatus. 



Spirifer of. striatus. 



Syringothyris cuspidata : occurs persistently ; abundant in the middle 



of the series. 

 Syringothyris aff. laminosa. 

 Leptcsna sp. 

 Ortliotetes aff. crenistria (mut. C) : occurs throughout ; abundant 



at certain levels. 

 Ehipidomella aff. Michelini. 

 Derbya sp. 



Chonetes papilionacea : abundant at numerous levels throughout. 

 Chonetes cf. comoides : abundant at numerous levels in the lower part. 

 Troductus semireticulatus, mut. (cf. Pr. concinnus) : occurs persistently. 

 Productus aff. Cora (mut. C). 

 Productus 0. 

 Productus, sp. nov. (See p. 557.) 



The bryozoan ' Chcetetes'' tumidus occurs in the upper part of the 

 zone, as it does in neighbouring areas. 



