﻿58 MK. S. S. BUCOIAN ON CEKTAIN [Feb. I9IO,, 



be dated as hemera schlcmbachi : the section of Burton Bradstock 

 (p. 72) will show what this means. 



Below these limestones are red earthy stone-beds, much iron- 

 shot, the grains becoming coarser and coarser in the lower part. 

 Rather more than 6 feet of these was noted, and their fossil evidence 

 in part is abundant. A few inches of the top yield Ammonites 

 indicative of the sauzei zone ; and about 2 feet down there is evidence 

 of the fauna of the Witcliellice hemera. The date of the lower 

 part is not certain: the only evidence was an Ammonite which could 

 be said to be a coronate, and either Emileia or a Stejjheoceras-like 

 form ; its condition did not allow of any more exact determination, 

 but it suggests hemera Shirbuirnice (Sonninice). Below this there 

 seems to be a break in the sequence — nothing of cUscitce or concavi 

 date was noted, 1 though the discovery is possible. The next bed 

 seen is what the quarrymen call the Wild Bed, with its planed- 

 off top, by which they say it can be recognized all over the hill. 

 In some places the top of the Wild Bed shows pockets containing 

 Ammonites of the Brasilia -I radf or densis style, in a matrix 

 different from that of the Wild Bed proper. The Wild Bed itself 

 is remarkable for the number of finely preserved examples of the 

 Ludwigia-murchisortce style, many of which from this locality* have 

 been figured in my Monograph. 



At the bottom of the Wild Bed, attached, is a different matrix 

 containing a big Lytoceratoid, near to PacJn/lytoceras aalenianum . 2 

 The Lytoceras wrighti cited in the former paper 3 is, perhaps, this 

 species, for L. wricjliti strictly defined is a noticeable fossil of the 

 strata of aalensis hemera, a good bit lower down. 



This basal part of the Wild Bed it is desirable to date as some- 

 thing earlier than mvrcliisonw hemera and later than scissi : it may 

 be dated as Ancolioceras hemera ; and it will be discussed later. 



Below the Wild Bed is the first bed of the Bridport Sands — a hard 

 sandy limestone — the scissitm bed — with Tmetoceras scissum and 

 Lioeeras, that is, the true opalinvm group (see Burton Bradstock 

 section, p. 74). Below is marl and stone with badly preserved 

 Opalinoids. Some 6 feet lower is found a noticeable little globose 

 Rhynelwnella in some abundance {Bliynchonella pentaptyeta, sp. nov. r 

 see the palceontological paper, p. 103). 



Associated with it are fine-ribbed Ammonites of Canavarina- 

 steinwanni type. About 2 feet lower are many Ammonites of the 

 aalensis pattern (for instance, Canavarina, Cottesivoldia , etc.), on 

 the whole coarser in the character of their ornament than those 

 above ; they are good, but difficult to extract. For about 25 feet 

 down there are more or less indications of Ammonites of the 

 aalensis pattern. Then there is a break of some 15 feet, which 



1 Sovvinia dominans, ' Monogr. Inf. Ool. Ainm.' p. 324, from Chideock would 

 indicate the presence of dilates deposit. A little to the east, at Mappercombe 

 near Powerstock, evidence of dhedtee deposit was found by the roadside : — 

 Terehratnla e-udesiana, Bhynchonclla forbesi, and a Sonninian. 



2 Quart, Journ. Geol. Soc. vol. lxi (1905) pi. xv, figs. 3 & 4. 

 s Ibid. vol. xlvi (1890) p. 519, Bed 4. 



