200 



DE. C. 



T. TKECHMANJf OX I>~TER GLACIAL [vol. lxxv, 



the Castle-Eden deposit is approximately of Teglian age. It may 

 be a little older, but is not newer. 



I append a list of species (p. 199) showing, so far as I have been 

 able to determine it, the relation of the Castle-Eden plants to 

 living British, and to Cromerian, Teglian, and Eeuverian plants. 



XI. Description of the Mosses. Bv Hugh Neville Dixox, 

 M.A., F.L.S/ 



I have identified the follow: 



Neckera complanata (L.) Huebn. 

 Homalia trichomanoides (Schreber) 

 B. &S. 



Thaidium (?tamariscenium) (L.) B. & S. 

 Eurhynchium sivartzii (Turn.) Hobk. 

 Eurliynchium prselongum (L.) Hobk. 



Also a fragment which may be something different, but possibly 

 also Eurhynchium sivartzii. 



The first two are arboreal mosses, the others terrestrial. They 

 are all the ordinary species that one might meet in a wood, or a 

 lane-side now, in any lowland part of England. 



XII. Description of the Nox- Marine Mollusca. By Alfred 

 Santer Kennard, F.Gr.S., and Bernard Bar ham 

 Woodward, F.L.S., F.G.S. 



Nineteen species of mollusca were sent to us by Dr. Trechmann. 

 which he had obtained by washing the clay. The species were : — 



Succinea putris (Linnaeus). Bare. 



S. pfeifferi Bossmassler ? Do. 



Limn sea pereger (Muller). Common. 



L. palustris (Muller). Bare. 



L. trimcatula (Muller). Do. 



L. stagnalis (Linnaeus). Do. 



Planorbis Isevis Alder. Common. 



P. crista (Linnaeus). Do. 



P. wnbiUcatus (Muller). Bare. 



P. lencostoma Millet. Do. 



Valvata piscinalis (Muller). Common. 

 V. cristata Muller. Bare. 



JJnio sp. Do. 



Anodonta cygnsea (Linnaeus). Do. 

 Pisidivm amnicum (Muller). Do. 

 P. casertanum (Poli). Common. 



P. cf . lacustris B. B. Woodward. Do. 

 P. nitidum Jenyns. Do. 



P. subtruncatum Malm. Do. 



P. hensloivanum (Sheppard). Do. 



Since there is an almost total absence of characteristic species, it 

 is difficult to speak definitely as to the age of the bed. They are 

 all living forms, but the abundance of Planorbis Icevis shows that 

 we are dealing with a deposit of some antiquity. If we judge 

 from the known facts, the bed may well be the equivalent of the 

 Crayford Brickearths or rather later. 



Valvata piscinalis is not known to occur at an earlier horizon, 

 and, although the examples are not typical, they must be referred 

 to that species. 



It should, however, be remembered that we have practically no 

 knowledge of the pre-Holocene Mollusca of the North of England, 

 and therefore it is quite possible that the deposit may be older 

 than our present knowledge warrants us in inferring. 



