550 - L.F. Spath— 



dykes. Possibly six to twelve feet below the last level, when 

 the ledges again appear at 

 Level X^, 



Tragopkylloceras numismalis (Quenstedt), 

 Metoxynoticeras gen. nov.^ oppeli (Schloenbach), 

 „ cf. sphenonotum (Monke). 



were collected, and at two and again three to four feet below 

 numerous nodules enclosing 



Polymorphites caqnarius (Quenstedt) 

 and allies. Shales with similar red nodules, but yielding no 

 ammonites, follow to eight to ten feet below X^, and at this 

 Level Xq were collected : — 



Apoderoceras afi. leckenhyi (Wright), 



„ afi. trimodum (Dumortier), 



„ sp. n. aff. himacula (Quenstedt), and 



quadrarmatum (Dumortier), 

 Five feet lower, a gigantic 



" Oxynoticeras " sp. 

 was found, but another barren stretch follows, and at about 

 sixteen to eighteen feet below Xg, and near the eastern point of 

 the island, there occurred : — 

 Deroceras milleri (Wright), 

 „ aff. miles (Simpson), 

 forms that may already belong to the Sinemurian raricostatus 

 zone. It is interesting to note that no Echioceras has yet been 

 found in Pabay, but that species near to E. macdonnelli are 

 somewhat abundant in Camas-na-Sgianadin, 2 miles north- 

 west of Broadford in Skye, and north of the beds with Asteroceras 

 smithi recorded by the writer. ^ There, however, no Derocerates 

 occur. 

 The beds may be correlated as follows : — 



X^ maugenesti beds. ibex zone (Oppel). 



12 ft. below X^ masseanus beds ^ 



Unfossilif. ledges .... 



X^, X^a jamesoni beds 



7ft. below X^a obsoleta beds 

 X^^, etc. brevispina beds 



X^y, etc. Polymorphites beds 



no Ammon. .... 



Xg taylori (leckeoibyi) beds 



There may be repetition of the Polymorphites beds by faulting, 



but the relations are not very clear and, moreover, Polymorphites 



caprarius and its allies seem to have a fairly wide vertical range ; 



for just north of the farm on the south-west coast of the island, the 



^ Genotype to be example No. 2,141, identified with Ammon. oppeli, 

 Schloenbach : " Beitr. Pal. Jura und Kreideform. N.W. Deutschl." Palceontogr., 

 vol. xiii, 1865, p. 161, pi. xxvi, figs. ia-c. 



" "Lower Lias Ammonites from Skye," Geol. Mag., Vol. LIX, 1922, p. 172. 



'jamesoni zone (Oppel). 



