120 MRS. E. M. REID ON TWO [vol. lxxvi, 



Eumex sp. (PL VIII, fig 8.) 



Nut ; surface smooth, and finely striate. 



Length = 2 mm. ; breadth=l"25 mm. 



The nut is highly pyritized and badly preserved. It does not 

 belong to the last-mentioned species. There is also a large tubercle 

 and a small fragment of a fruiting valve which may belong to the 

 same species. None of these are in a condition such as to admit 

 of determination. 



Since this description was written the nut has become thickly 

 covered with efflorescence. 



CHENOPODIACE^. 



Chenopodium urbicum Linnaeus. 



A minute ChenopocUum seed, of which the outer coat is pre- 

 served, resembles the seeds of 0. urbicum. It is smaller than the 

 average size of the seeds of that species, though exceptionally they 

 are as small as '6 mm. in diameter. I think that it should be 

 referred to C. urbicum. 



Diameter='7 mm. 



Unfortunately, since this description was written the specimen 

 has disintegrated and disappeared. 



-The species occurs throughout Europe and Northern Asia. 



CARYOPHYLLACE^:. 



Stellaria aquatica Mcench. (PI. VIII, fig. 9.) 



Length = - 9 mm. ; breadth ='8 mm. 



A single seed in excellent preservation agrees in every respect 

 with this species. The species is distributed throughout Europe, 

 Northern and Western Asia, and Northern Africa. 



Since this description was written the seed has become covered 

 with efflorescence, and has burst. 



Cerastium sp. (?). (PI. VIII, fig. 10.) 



A fragment of testa shows large tuberculate cells with deeply- 

 foliate interlocking sutures, characteristic of Caiyophyllaceae. 

 The tubercles are arranged along concentric curves, and, being 

 elongate in the direction of curvature and closely adjacent, cause 

 the testa to be thrown into a series of concentric tuberculate ridges. 



Sculpture of this kind is found in some species of Cerastium, 

 the seeds of O. perfoliatum bearing a very close resemblance to the 

 fossil fragment. I have not been able to find sculpture of exactly 

 this kind on an} r other genus of Caryophyllaceae. 



