BOYCOTT : CECOLOGICAL NOTES. 129 



not occur on the sandy breck country in Norfolk and Suffolk/ and 

 that, while it occurs on the limestone at the northern end of More- 

 combe Bay and at the Great Ormes Head, it has not spread into 

 the extensive adjacent maritime sand dunes in either neighbourhood : 

 also that the calcareous nature of sea sand dunes is indicated by 

 the occurrence of various calcicolous plants. 



Mr. A. S. Kennard mentioned the abundance of the species in 

 a prehistoric deposit among the sand dunes at Harlyn Bay, Cornwall 

 West, 4 miles west of Kock : it no longer occurs alive there. He 

 also pointed out that it did not occur on inland, and presumably 

 non-calcareous, sands, in Essex, Kent, and Devon, though present 

 in adjacent calcareous areas of chalk or greensand, and that the 

 evidence as a whole indicated that the species wanted plenty of 

 lime, and that a loose surface soil, unless calcareous, did not provide 

 a suitable habitat.] 



2. SUGCINEA OBLONG A AT BrAUNTON BuRROWS. 



In this well-known Devonshire locality S. ohlonga (of the form 

 S. arenaria : A. S. Kennard and B. B. Woodward, Proc. Geol. Assoc, 

 xxviii, 1917, p. 172)occurs abundantly in theflats behind the sandhills 

 in slightly sunken areas, generally more or less circular, where the 

 soil is definitely sandy and thinly covered with low-growing plants. 

 It does not seem to live on the mobile or stabilized dunes, nor where 

 the soil is earthy and thickly covered with grassy vegetation, nor 

 on the slightly raised parts, where the soil is compact and Salix 

 repens abounds, nor among the rushes {Juncus effusus) near 

 the draining ditches with Vertigo moulinsiana. By the kindness 

 of Dr. E. J. Salisbury I put on record the following list of a complete 

 collection of plants from a typical locus : Potentilla reptans, P. 

 anserina, *Anagallis tenella, *Sagina nodosa, *Samolus valerandi, 

 "fGlaux maritima, Plantago coronopics, Linum catharticum, Mentha 

 arvensis, Gentiana prcBcox, Carex glauca, Hypochoeris radicata. 

 Prunella vulgaris, "fCarex arenaria, Cardamine hirsuta, *Eleocharis 

 palustris, *Hydrocotyle vulgaris, "fErythroea pulchella, Euphrasia 

 stricta, * J uncus articulatus, * Carex cederi, Pellia fahbroniiaria, 

 Geoglossum hirsutum ; Plantago coronopus being by far the most 

 abundant species. In various other ohlonga areas we found in 

 addition occasional plants of *Inula dysenterica, Equisetum arvense, 

 *Ranunculus flammula var. repens, *Epipactis palustris, Bellis 

 perennis, *Teucrium scordium, and Lotus corniculatus. Of these 

 plants those marked f are maritime, while those marked * are 

 marsh species, and the vegetation indicates a habitat which is 

 damp and sometimes, but not always, under water. The marsh 



1 S. P. Woodward (in R. Tate, Land and Freshwater Mollasks, 1866, p. 222) 

 notes it as " found in great profusion on the bosses of chalk that appear among 

 the overlying Tertiary gravels and clays, and not found in the intervening 



