The Liassic Succession of Pabay, Inner Hebrides. 549 



Uptonia jamesoni (Sowerby). 

 „ cf. lata (Quenstedt). 

 Farther east still, at 

 Level X^, about thirty feet below the maugenesti reefs, also between 

 the two dykes at the eastern of the two northern extremities 

 of the island, Uptonias are very common, notably : — 

 UjJfonia jamesoni (Sowerby). 

 ,, lata (Quenstedt). 

 ,, angusta „ 

 ,, lacunosa ,, 

 „ margata ,, 

 „ costosa ? ,, 

 „ sp. nov. 

 Just east of the eastern dyke 

 Uptonia jamesoni (Sowerby) 

 „ cf. lacunosa (Qxienstedt) 

 still occurred, but another dyke again interrupts the succession, 

 and six feet below this (dyke) 

 Level X^a there was found : — 



Platypleuroceras aff. aureum (Simpson). 

 Seven feet below : — 



Ujjionia cf. obsoleta (Simpson). 

 At ten, fourteen, and fifteen feet below X^a : — 

 Platypleuroceras brevispina (Sowerby) 

 ,, molare (Hyatt) 



occurred, and, after another dyke, at 

 Level X^/3 :— 



Platypleuroceras brevispina. (Sowerby) 



,, sp. n. aff. tenuilobum (Quenstedt) 



and four feet lower : — 



Platypleuroceras sp. aff. brevispina (Sowerby). 

 Another dyke then follows, and perhaps ten feet below X^ft 

 the reefs of 

 Level X^7 yielded : — 



Polymorphites quadratus (Quenstedt) 

 „ caprarius (Quenstedt) 



and varieties. 

 At two and eight feet below occurred : — 



Platypleuroceras sp. n. aff. tenuilobum (Quenstedt), 

 and, at twelve feet below, the same form and 



Platypleuroceras cf. amplinatrix (Quenstedt). 

 After another dyke, at about two feet lower, 

 Level X^8 the last species was again found. A second and 

 faulted dyke follows, then come shaly beds with red nodules, 

 similar to those of the south-west coast, to be mentioned later 

 and yielding no ammonites. To the south-east the beach is 

 .then largely hidden by boulders and there are also numerous 



