﻿vol. 66j] derbyshire and nottinghamshire coalfield. 337 



Fayolia. 

 (PI. XXVI, Qg. 3 & PI. XXVII, figs. 1-2.) 



1884 Fayolia, Renault & Zeiller, C. R. Acad. Sci. Paris, vol. xcviii, p. 1391 (Fayolia 

 dentata fig., Fayolia grandis fig.). 



1884. Fayolia, Weiss, ' Steinkohlen-Calamarien ' vol. ii. p. 203 (as Gyrocalamus r 



Weiss, vol. ii, p. 152). 

 1888. Fayolia, Renault & Zeiller, C. R. Acad. Sci. Paris, vol. cvii, p. 1022. 

 1888. Fayolia, Renault & Zeiller, ' Flore Fossile (Terrain Houiller de Commentry) ' 



pt. i, p. 15 et seqq. (Bull. Soc. Industr. Minerale, St. Etienne). 

 1888. Fayolia, Scnenk, ' Die Fossilen Pflanzenreste * p. 186. 

 1890. Fayolia, Renault & Zeiller, ' Flore Fossile ( Terrain Houiller de Commentry) T 



App. to pt. i, pp. 369 et seqq. (Note rectificative) . 



1885. Spiraxis, Newbeny, Ann. N. Y. Acad. Sci. vol. iii, p. 219. 



In Shipley Clay pit were found four examples of the genus 

 Fayolia. Three of* these are fragments of uncompressed examples ; 

 the other is compressed, and is in too imperfect a state of preservation 

 for accurate determination. 



These organisms were first found in the Commentry Coalfield by 

 M. Fayol, and were described by Kenault & Zeiller in 1884. 

 Prof. Zeiller, in the 'Flore Fossile (Terrain Houiller de Commentry) ' T 

 thus describes the genus : — 



'Corps fusiform es ou cylindriques, effiles en pointe a leurs deux 

 extremites, portes au sommet d'un pedoncule, et formes de deux valves 

 plus au moins concaves en dehors, soudees Tune a l'autre par leurs 

 bords, contournees en helice, et circonscrivant une cavite centrale. 

 Valves marquees, un peu au dessus de leur ligne de suture, d'une file de 

 petites cicatrices rondes ou elliptiques. Lignes de suture de 

 ces valves portant chacune une collerette helicoidale etalee, 

 a bord entier ou dentele.' (Pp. 15-16.) 



He then (pp. 22 et seqq.) describes two species : — 



1884. Fayolia dentata, Renault & Zeiller, C. R. Acad. Sci. Paris, vol. xcviii, 

 p. 1393 & p. 1392, fig. 1. Weiss, ' Steinkohl. Calami' vol. ii, p. 204 & p. 203, 

 fig. 1. Saporta, in A. d'Orbigny's ' Paleont. franc,. : Yegetaux, Terr. Jurass.' 

 vol. iv, pp. 39, 40 & pi. iv, fig. 1. 



Body fusiform, 8 to 16 cm. long, 15 to 25 mm. broad across the middle, 

 carried on a smooth or finely striated pedicle, and composed of two concave 

 valves 5 to 10 mm. wide, fused along their borders, and arranged in a spiral, 

 showing six to seven turns of tbe spiral. Valves marked at 1 to 2 mm. above 

 their fused borders by a row of small round scars *75 to 1*5 mm. in diameter, 

 and placed 1"5 to 3 mm. apart from centre to centre, sometimes carrying bent or 

 straight spines with fine longitudinal striations 12 to 25 mm. long. The lines 

 of suture of the valves are slightly raised, and carry a spiral collerette with 

 a finely dentate or fringed margin from 5 to 6 mm. wide, apparently bacoming 

 free towards the apex of the fossil, and gradually diminishing in width to end 

 in a vertical point and lose its dentate margin. 



1884. Fayolia grandis, Renault & Zeiller. C. R. Acad. Sci. Paris, vol. xcviii, 

 p. 1393 & fig. 2. Weiss, 'Steinkohl. Calan..' vol. ii, p. 204 & p. 203, fig. 2. 

 Saporta, in A. d'Orbigny's 'Paleont. franc. : Yegetaux, Terr. Jurass.' vol. iv, 

 pp. 39, 40 & pi. iv, fig. 2. 



1884. Possibly Fayolia palatina, Weiss, ' Steinkohl. Calam.' vol. ii, p. 204. 

 (Gyrocalamus palalinus, ibid. p. 152 & pi. iv, figs. 3-4.) 



Body cylindrical, narrowing to a point at the extremities, 3 to 4 cm. wide 

 and more than 40 cm. long, formed of two slightly concave, finely striated 

 valves, fused to one another along their borders, and forming a spiral with at 

 least eight to ten turns. Valves showing. 5 to 6 mm. above their lines of 



