﻿454 



DE. A. VAUGHAN OX THE FAUJ^AL SUCCESSION [Aug. I908, 



(y)...Orthid. 



(y)... Glabrous Spiriferid. 



(x)...AthTrid. 



(x)...PliilIipsid. 



Schi202jhoria {?). 



CyathaiTonia-Beds : 



(j)...Amplexi-Zaphre7itis. 



(y ) ... (?) ' Cyathaxon ia ' costata, 



M'Coy. 

 (y)...Lithostrotion sp. 



DP 



( L 4 g) . . . Productus corrugato-striaUis. \ 



Posidonomi/a-Zone (P) : 



(y ) . . . Syringopora cf . ramulosa 



(Goldf.), Ed. & H. 

 (x)...Michelinia tenuisepta (Pliill.)? 

 (y)...Cyathophylloid variant of 



Lithostrotion Martini, Ed. 



&H. 

 (x)...Fistulipora minor, M'Coy. 

 {x)...Frodiictus longispinus, Sow. 



var.(cf.Pr.sw«ai'MS,deKon.). 

 {x}... Productus punctatus (Mart.), 



Dav. — small form, 

 (x, y)... Chonetes sp. —small papilion- 

 aceous form. 

 (L8/)-'-I^o^gitudinally- striate plant-stems and other plant-remains (the 



surface of certain beds is covered with narrow curved filamentous 



markings — ? plants). 



(x). 

 (x). 



(y). 



.Spirifer cf, 



Dav.(?). 

 .Spirifervia 



Dav. 

 .(?) Cyrtina 



(M-Coy). 

 (x)...Aviadopecten plicatus. 



striatus (Mart.), 



cf. hiplicata, 



cf. carbonaria. 



(X). 



(x).. 

 (z).. 



(y).. 

 (y).. 



Aviculopecten clathratus. 

 ,cf. Captdus angustus. 

 Metoptoma pileus (Phill.). 

 .(?) Sto'oboceras sulcatum. 

 , Thrincoceras. 



Eepetition of P (L 10 to L 13) 



(j)...MicheIi7iia sp. (thick-walled), 

 (y) . . . Densiphylloid Zaphreniis — a 



large form ; cf . Z. Knniskil- 



leni, Ed. & H. 

 (y). . .Amplexi-Zaphrentis. 



(j)...Fisiidipora cf. incmstans, 



Nich. & Foord. 

 (x, y) . . . SckizopJioria resupinata 



(Mart.), Dav. 

 (y ) . . . Rliipidomella (?) . 

 (x)...PhiUipsid. 



VII. I^OTES ON THE SpECIES PIGUEED IN THE PlATES, AND ON SOME 



OTHEK Impoetant Poems. [A. Y.] 



In accordance with the main purpose for which I undertook the 

 study of Dr. Matley's material, the species figured and described in 

 this section have been selected entirely on account of their value 

 (1) in zoning the Eush-Skerries sequence itself, and (2) in cor- 

 relating the various rock-groups of this sequence with those of 

 other areas. Facts of purely palseontological interest have been 

 reserved for future exposition. 



Prequent reference is made in this section to the following 

 works : — 



John Phillips : ' Illustrations of the Geology of Yorkshire ' pt. ii. Lon- 

 don, 1836. 



Frederick M'Coy : ' British Palaeozoic Fossils ' 1851-55. 



Alpiionse Milne-Edwards & Jules Haime : ' Monogr. Brit. Foss. Corals 

 pt. iii (1852) Palseont. Soc. 



