268 MR. E. A. WALFORD ON [May t902, 
The special or more abundant fossils of the Spiriferina- Be 
Beds (2) are :— 
Anunonites margaritatus. Harpax levigatus. 
Amm. spinatus. Cardinia Philea. 
Belemnites paxillosus.* Ostrea submargaritacea. 
Rostellaria admiranda. O. sportella.* 
Trigonia lingonensis. Ethynchonella acuta. 
Protocardium truncatun (mainly Spiriferina oxygona. 
derived). Thamnastrea Htheridgti. 
Lima Elea. | Leuandra Walfordi. 
[The fossils marked with an asterisk are especially abundant. | 
Division | (the Ferrocrinoid-Beds) I take to be unrepresented in 
Dorset, Somerset, and Gloucestershire. There the marlstone yields 
large Gryphwa, Ostrea, and Cardinia, together with Ammonites 
spinatus and Amm. margaritatus. The fauna is that of the Spiri- 
Jerina-oxygona Beds of Oxfordshire with, however, many of the 
brachiopoda of the higher division. The Leicestershire and Rutland 
beds are of the Oxfordshire type. 
While the concretionary beds of division 2 with a typical coral- 
fauna were being deposited, the more marly beds of Somerset and 
Dorset developed a fauna of large growth but of more widely-spread 
forms. Thesame conditions appear to have extended over Northern 
France, and I have grouped the Middle Lias of Calvados in Lower 
Normandy and that of the counties of Dorset, Somerset, and 
Gloucester together as the Anglo-Norman Basin. In Normandy, 
as in the South-west of England, the remains of the later Middle 
Lias and the Upper Lias are found resting upon Paleozoic rocks. 
The late Prof. E. Eudes-Deslongchamps brought evidence to prove 
the possession of the Palozoic sea-floor by a Liassic fauna. My 
endeavour is to show that the fragmentary type of those deposits 
may be explained by long-continued waste (inter-waste) rather 
than by contemporaneous erosion. 
The Ferrocrinoidal ironstone (div. 1) bears a sparse generic 
fauna, though from its thickness and apparently slow accumulation 
other results might be expected. Beds of brachiopoda make up in 
number of individuals for the deficiency in number of species. The 
common: Lhynchonella tetrahedra attains wide diversity of form, 
reaching however its largest growth in the preceding Spiriferina- 
oxygona division. Banks of Terebratule occur, replacing for a time 
the Rhynchonelle, but nearly all the species are common to the 
two horizons. Beds crowded with the remains of Ferrocrinoids 
range through the whole of the deposit of this time. The green 
limestone of the bottom beds and the fawn-coloured, more marly 
limestone of the top bed are packed with their sinuous stems, which 
may often be seen in the weathered masonry of old buildings. ihe, 
excellence of the flaggy stone, locally known as ‘top rag’ and in 
great use as a paving-stone, is owing to the packing of the several 
beds with the stems of the same organism, This great calcareous 
bank, it may be assumed, was of sufficiently indurated type to allow 
the accumulation in its hollows and sides of the clinging masses of 
