part 4] 



OX TtfE FOSSIL FLORA OF CLAdiOJT-Ojf-SEA. 



621 



they had been contemporaneous. Not only so, hut, if peculiar 

 individual species he considered (leaving out of account Najas 

 minor, which is common to the three floras), all the exotic 

 Cromerian species, except Picea excelsa, and the rare living 

 species, such as Nqjas marina and Stratiotes dloides, are absent 

 from Clacton ; whereas the few West Wittering and Selsey 

 rarities (except Najas graminea) are found. The Clacton 

 Crataegus, though not identical with the West Wittering species, 

 is nearer to it than to any other, either fossil or living. 



It is upon this evidence that we have independently readied the 

 same conclusion as Mr. lieid : namely, that the Clacton deposit 

 was probably contemporaneous with those of West Wittering 

 and Selsey. 



We add the description of two fossil species of Crataegus, the 

 one from Clacton, and the other from West Wittering, both 

 apparently allied to C. pyracaniha. The West Wittering species, 

 although it was discovered many years ago by Mr. Eeid, and may 

 have been referred to C. pyracaniha, is distinct from that species. 

 We have, therefore, taken this opportunity of describing and 

 naming it. 



Crataegus clactonensis sp. nov. (cf. C. pyracaniha Medic). 



Diameter of berry = 3 mm. ; diameter of carpels — 2o mm. 

 Carpel obovate-euneate, narrow, broadest at two- fifths of the 



distance from the apex. Ventral 



Fig. 1. — Crataegus clactonensis margin straight; dorsal surface 



sp. nov. (Length = 2' 25 uniformly convex, contracted or 



nun.; breadth = l , 25 mm.) depressed over the nude area; 



junction of adherent and nude 

 areas about three-quarters of the 

 distance from the apex on the 

 ventral margin, and about a 

 quarter of the distance from the 

 apex on the dorsal face ; style 

 small, terminal, patent, very 

 slightly sunk below the convex 

 top of the carpel ; surface finely 

 granulate. 



Length of carpel = 2 2o mm. ; 

 breadth = l - 25 mm. 



One perfect berry was found. 

 The species is almost certainly extinct. 

 Locality. — Clacton-on-Sea (Essex). 



