510 PROF. H. A. NICHOLSON AND MR. J. E. MARR ON 



(a) Corona Series. — The principal variations in the litliological 

 characters of this group were described when discussing the succes- 

 sion in Swindale Beck and on lloman Fell. They appear to con- 

 sist essentially of calcareous ashes, with their limestones, the ashy 

 matter becoming more abundant and coarser as we go southwards ; 

 though if the beds on the Fell Road at Melmerby actually belong 

 to this division, this statement must be modified, for they also 

 contain much ashy matter. It is, however, possible that they are 

 on a somewhat lower horizon than the Oorona-heds proper, as has 

 been already suggested. They somewhat closely resemble the 

 Balclatchie beds of the Girvan district, but a much larger collection 

 of fossils than that which we have acquired must be made before a 

 definite opinion as to their age can be offered. 



"We have already mentioned the fossils found in the Corona-beds 

 at Swindale Beck, where the fossils are not very numerous. In 

 other localities the yield has been far more abundant, and we append 

 a list of the forms we have obtained from these beds : — 



Monotrijpa sp. PusgilL 



ConchicoUtes gregarius, Nich. Pusgill ; Roman Fell. 



Ateleocystites sp. Item an Fell. 



Beyrichia WilcTcensiana^ Jones. Pusgill : Roman Fell. 



Primitia semicircularis, Jones & Holl. Pusgill. 



Uomaloyiotus ruclis, Salt. (?). Roman Fell. 



Lingula tenuigranulata, M'Coy. Pusgill ; Roman Fell. 



Orthis testudinaria, Dalm. ' Roman Fell. 



Trematis corona., Salt. Pusgill ; Harthwaite Beck ; 



Roman Fell. 

 Amhonycliia grypJms, Portl. Pusgill ; Roman Fell. 

 BeUerophon aciitus, Sow. (?). Roman Fell. 

 bilohatus, Sow. Pusgill ; Roman Fell. 



Actinoceras Pasgillensis, n. sp. Pusgill. 



Cyrtoceras (?). Roman Fell. 



The gasteropods and lamellibranchs which occur so abundantly 

 on Roman Fell, and less numerously at Pusgill, would require the 

 attention of a specialist for their satisfactory determination. The 

 genera Ctenodonta and Pleurotoma7na appear to be represented by 

 several species. 



These Corona-beds seem to be older than anything which has 

 been referred to the Coniston Limestone Series in the main Lake 

 District. Their fauna is a very marked one, and is entirely different 

 from that of the ordinary Coniston Limestone ; and we are not 

 aware of an}- similar fauna having been recorded in the British 

 area, though it is probable that when the fossils of the Ardwell 

 Group of the Girvan district are described they will be found to 

 present considerable afl8.nities to the forms which we have found in 

 Westmorland. 



Abroad, we have two calcareous deposits whose faunas are closely 

 related to that of our Corona-beds, viz. : the Beyrichia-\\m.e,^toTiQ of 



