part I] 0>" THE FOSSIL FLORA OF CLAC'TOX-OX-SEA. 623 



Several species of small rive-stoned fruits have been found in the 

 Pliocene deposits of Castle Eden, Keuver, and Pont-de-Gail, but 

 they were not found in the Cromer Forest-Bed or at Tegelen. 

 Negative evidence is proverbially inadequate proof, and it may 

 be that this form of Crataegus will yet be found in the two 

 last-named deposits, even though very great quantities of material 

 from both have been examined. In any case, one would wish to 

 know the course of history which brought about the return of 

 these small five-stoned species to Britain during Interglacial 

 times. 



Appendix II. — The Chabophyt a from Clactois-on-Sea. 

 By James Geoves, F.L.S. 



The fruits vary considerably in size and shape, and represent in 

 my opinion two, or possibly three, species. 



(1) The type to which most of the specimens belong resembles 

 the fruit of the existing British Chara hispida, which it may 

 well be. The length of the oogonium appears to be about 800 /jl, 

 but none of the full-grown specimens is perfect at the apex ; the 

 breadth = about 550 to 600 /x. It is usually broadest about the 

 middle, and tapers slightly towards the base. The spiral cells 

 show some eleven or twelve convolutions. 



(2) The single dark fruit is apparently a different species, 

 about the length of the first, though narrower (500 /m), and broadest 

 about the middle but sub-cylindrical ; and the spiral cells show 

 rather more convolutions. Another fruit, a lighter-coloured, 

 imperfect specimen, may belong to the same species. 



(3) A single light-coloured specimen seems different from both 

 1 and 2. About as narrow as 2, but less cylindrical, tapering 

 conspicuously at each extremity ; length = probably about 82*5 /x ; 

 breadth = about 500 /x. The spiral cells would probably show 

 twelve or thirteen convolutions. This might well belong to the 

 existing species G.fragilis. 



The oospores seem, in all cases, to be well preserved. 



The fragments of stem and branches belong pretty certainly 

 to a Chara of the section Diplostephante Diplostichse, which 

 includes C. hispida and G. vulgaris ; in thickness they agree more 

 closely "with the latter than with the former. 



