132 MISS M. E. J. CHANDLER ON THE [vol. lxxix, 



S. Tealtennordheimensis the raphe is diagonal, except at its 

 extreme inner end, where it becomes transverse ; it enters the seed- 

 cavity at, and not below, the apex of the dorsal side. 



The differences just noted are differences of degree rather than 

 of kind, and there can be no doubt that the two species are closely 

 related forms. 



On the other hand, in the keel and micropyle, and in the cells 

 of the inner side of the keel, it approaches the Preglacial and 

 Pleistocene species (see p. 122). It thus constitutes a valuable 

 link between the ancient and the modern types of Stratiotes. 



8. Stratiotes intermedius Hartz. (PI. Y, figs. 18-19 & PL VI, 



figs. 17, 29.) 



1906. S. aloides Linn. (Menzel 62). 



1909. 8. aloides var. intermedius (Hartz 67). 



1920. S. aloides Tar. intermedius (Menzel 72). 



Seed oblong, narrow, feebly hooked at the base, very slightly 

 flattened ; keel moderately broad, crested, not merging gradually 

 into the collar, but continued round the base to the micropyle ; 

 collar small, insignificant, because not separated from the body by 

 a clearly defined neck ; testa thin, woody, ornamented with a few 

 small, but rather acute elongate tubercles arranged in longitudinal 

 rows ; pitting fine ; micropyle basiventral, transverse or reflexed, 

 narrowing markedly towards the exterior; hilum basal; raphe 

 diagonal, traversing the length of the dorsal and basal walls ; cells 

 of the interior of the keel narrow, parallel-sided, not digitate, 

 becoming broader, more irregular, and digitate at the edge of the 

 seed-cavity. 



Dimensions. — Length = 10 mm.; breadth=3 mm. (longest). 

 Length = 9mm. ; breadth = 3 mm. (shortest). 



Horizon. — Preglacial. 



Localities. — Amber-Pin Beds of Copenhagen. These beds 

 are Pleistocene, but they contain an admixture of Tertiary and 

 Quaternary plants. Preglacial Beds of Eime, near Banteln 

 (Hanover). 



Affinities. — See S. aloides (p. 133). 



9. Stratiotes aloides Linn, (fossil forms). (PL Y, figs. 20-22 



& PL YI, figs. 18-19, 30.) 



1856. ? Folliculites neuivirthianus (Massalongo 16). 



1878. ? F. neuivirthianus Massalongo (Sordelli 28). 



1892. ? F. neuivirthianus Massalongo (R. von Wettstein 41). 



1892. Paradoxocarpus carinatus (Nehring 34). 



1892. P. carinatus (Nehring 35). 



1892. F. carinatus N ehring (Potonie 36). 



1892. P. carinatus (Nehring 37). 



1893. F. carinatus Nehring (Potonie 43). 

 1893. P. carinatus (Nehring 44). 



1893. P. carinatus Nehring (Weber 45). 



1893. P. carinatus Nehring (Weber 46). 



1893. P. carinatus Nehring (Weber 47). 



1893. F. carinatus (Nehring) Potonie (Potonie 48). 



