400 MK. s. s. BUCKMAX OX [vol. Ixxviii, 



while the latter would find small forms occup34ng strata at a lower 

 horizon than the large forms. This sliows how much scope there 

 is for further work. 



Mr. J, W. Tutcher has kindly supplied the following identifica- 

 tions of gastropods and scaphopods which I have been able to give 

 him, as the result of chance collecting during various years at and 

 near Thorncombe Beacon. Some of the labels require a little 

 interpretation, because in earlier years I was necessarily less 

 conversant with the details of the sequence or the matrices of odd 

 blocks : — 



' Junction-Bed, hifrons layer.'. 



Discohelix dunlieri Moore. 

 ' Junction-Bed.' 



Trochus nodulatvs Moore. 

 ' Rhynchonella-serrata Bed.' 



Trochus lineatus Moore. 

 ' PieK.rofoinarm Bed.' [Seep. 394.] 



Pleurotomaria mirahilis Deslongchamps. 



Pleurotomaria oi. suhnodosa Goldfuss = possibly the form recorded 

 by Day as P. precatoria Deslongchamps. 

 ' Marlstone ' [ = spinatum ?] . 



Amherleya cf. gavdryana A. d'Orbigny. 

 ' Spinahim.' 



Trochus cf . flexicostatiis Moore. 

 ' Lower part of Marlstone ' [see p. 394]. 



Pleurotomaria mirabilis Deslongchamps. 

 *■ Margaritatus zone ' [=possibly the T.-thorncomhiensis Bed]. 



Cryptsenia cf. solarioides {S . Sowerby). 

 ^ Margaritatus ' [possibly inargaritatus bed]. 



Cerithinm liassicum Moore. 



Ataphrus cinctus Moore. 

 'Massive Sandstone-Bed.' 



Turbo aciciilus (Stoliczka). 



Dentalium eloiigatwn Moore. 

 ' With Amaltlieus cf . Isevis, pebble on beach, near Eypesmouth.' 



Dentalium elongatum Moore. 

 'Pebble on beach, Eypesmouth, below margaritatiis [bed], possibly 

 Starfish-Bed.' 



Actseonina ilminsterensis Moore. 



(D) Analyses of the Jimction-Beds, and Theories 

 as to the Watton Bed. 



From the faunal sequences arrived at in the foregoing studies, 

 and from, the results which have been already obtained and 

 published elsewhere,^ it is possible to present a detailed list of 

 successive hemerse, noting at the same time which of these 

 hemerse are represented by the fauna of the Junction-Bed at 

 various places. But, as a preliminary, it is advisable to present an 

 ej^itome of Walker's section at Bothenhampton. 



About 2 miles somewhat east by north of Watton Cliff was the 

 site of an exposure of the Junction-Bed at Shipton Long Lane, 



1 I, 7, p. 276. 



