334 MR. F. W. HAEMER ON THE LENHAM EEDS [Aug. 1 8 98, 



I believe that most of the Boyton specimens to he found in our 

 Museums have come from the Coralline Crag, and that the E-ed 

 Crag of that neighbourhood belongs to the Butley zone. Some- 

 times, however, the Coralline Crag shells have been discoloured by 

 infiltration from the immediately overlying Eed Crag. 



On the east side of Butley Creek, at several points in the parish 

 of Gedgrave, and near the edge of the marsh, the London Clay was 

 reached by boring through the Coralline Crag at depths of 9, 12, 

 and 13 feet respectively. A few small phosphatic nodules occurred 

 everywhere near the base of the Crag, but neither in any of the 

 borings at that place nor elsewhere did we meet with derivative fossils^ 

 or large stones, such as those found in the basement-bed at Sutton. 

 At one of these borings (No. 2 in fig. 4) we found, at a depth of 6 feet, 

 fragments of Cyprina, Astarte, etc., and lower down some small shells. 

 At another (No. 4) the Crag was very shelly, containing Astarte 

 Burtinii and Turritella incrassata, no large forms being observed. 

 At another spot (No. 5), on higher ground, but within a few yards of 

 the last, large species, as for example Cyprina and Venus, were abun- 

 dant, the borer grinding through them for 4 or 5 feet. The well- 

 known pit in the Gomer field (No. 10) is now ploughed up ; from 

 it were formerly obtained, at about the same level as that of boring 

 No. 5, a large variety of species, including many univalves (see the 

 list published by Prestwich ^), which are almost unknown from the 

 other pits in the neighbourhood.^ But I may mention, as illus- 

 trating the want of correspondence between these shelly bands, 

 that Mr. Buckingham, the veteran collector at Orford, has made a 

 number of attempts during the last few years to find a new exposure 

 of the old Gomer bed, though without success. 



Personally I have not seen the Gomer section for nearly 30 years, 

 as it has always been closed during my many visits to Orford, but 

 Mr. P. Y. Kendall has sent me the accompanying sketch (fig. 8), 

 made in 1884, which he is kind enough to allow me to reproduce. 

 One interesting feature of it is the small band of unstratified argilla- 

 ceous Crag, 1| to 3| feet only in thickness, in which he observed 

 a number of lamellibranchs (27 species) with the two valves 

 united, and in the position of growth. Trophon dlveolatus and 

 Tr. consocialis^ with other gasteropoda, were commonly found in 

 this bed. Lower down, Cardium decorticatum was met with in great 

 abundance. This species occurs also in profusion in the highest 

 part of the Crag at Aldeburgh (see p. 338), and at the Park-gates 

 pit at Sudbourne, but only in the form of casts. Near the water- 

 line at the Gomer section there was a bed of comminuted Crag with 

 many fine gasteropoda, especially a Brocchia, almost unknown else- 

 where ; and many such facts might be adduced to show a want of 

 correspondence in the moUuscan fauna of dififerent exposures of the 

 supposed zones. 



^ Quart. Journ. Geol. Soc. vol. xxvii (1871) p. 124. In none of my borings 

 did I find any trace of this Gomer shell-bed with abundant univalves. 



^ Mr. Wood, sen., obtained from one pit at Sutton, with a vertical range of 

 a few feet, specimens of nearly all the species known from the Coralline Crag. 



^ These two furnish an example of species which are found at Gedgrave, but 

 not, so far as I know, at Sutton. They occur also at Eamsholt and Boy ton. 



