We have found no trace of the genus Nuphar in the Teglian; so there is appar* 

 ently no continuity between the Reuverian species and that of the Cromerian, which 

 last is indistinguishable from the living N. luteum. 



NUPHAR Sp. 

 PI. VII, figs. 4, 5. 



A single badly preserved seed of Nuphar cannot be referred either to N. luteum 

 or to N. canaliculatum. It is distorted, damaged, and only part of the embryotega remains, 

 so that it cannot be made the type of a new species. The surface is well preserved; it is 

 dull, covered uniformly with very small irregular*shaped pits, which tend to become 

 rectangular towards the embryotega, and to give rise to longitudinal striae, though this 

 character is less marked than in N. luteum. The small part of the embryotega which is 

 preserved shows a large micropyle with incurved edges and concentrically arranged 

 pits; close beside it is the scar of the hilum. 



Length 4.3 mm., breadth 3.2 mm. Reuver. 



The much finer surface sculpture makes it impossible to refer this seed either 

 to N. luteum (fig. 6.) or to N. canaliculatum. In shape it appears to have been more regu* 

 larly oval than either. 



EURYALE. 



A few years ago the genus Euryale was only known as a monotypic waterlily 

 of China and Assam, usually in cultivation. In 1907 two different and extinct European 

 species of the genus were 'described, unfortunately both under the name E. europaea. 

 As the Russian plant figured by Dr. C. A. Weber was published a few months before 

 ours from Tegelen, we altered the name of the latter to E. limburgensis. Now the Reu* 

 verian deposits have yielded two other extinct species, so that instead of the genus 

 being monotypic we have five well-marked species, and instead of being confined to 

 Eastern Asia it proves once to have extended from end to end of the Palaearctic region. 



All the species of Euryale have very large seeds, with surfaces more or less granu* 

 lar or nodose. This irregular roughness of the testa is exceptional in the Nympheaceae, and 

 is quite unlike the lines of tubercles seen in the above described Brasenia tuberculata. 

 The testa of Euryale varies from the highly polished but flatly granulate E. limburgensis 

 (fig. 14) to the rough E.ferox (fig. 7) or the nodose E. nodulosa (figs. 8— 10); but in every 

 case the sculpture is irregular and does not fall into lines or bands as in most waterlilies. 



EURYALE NODULOSA Sp. nov. 

 PI. VII, figs. 8-10. 

 Semina irregulariter globosa, superficie umbilicis et jugis magnis et irregu* 

 laribus tecta; hilum annulo incrassato cinctum. 



Six seeds belonging to a new species of Euryale have been found at Reuver. 

 Their testa is somewhat thinner than in most of the other species, and therefore they 



87 



