128 MISS M. E. J. CHANDLEK ON THE [vol. lxxix, 



4. Stbatiotes websteri Zinndorf (? Brongniart). (PL V, figs. 7- 

 12, 31 & PI. VI, figs. 1-5, 26.) 



1822. Carpolithes thalictroides var. B. ivebsteri (Ad. Brongniart 2). 



1822. C. thalictroides var. B. websteri (Ad. Brongniart 3). 



1849. C. ivebsteri (Ad. Brongniart 9). 



1855. Folliculites minutulus Broun (J. D. Hooker 14). 



1856. F. thalictroides var. Brongniart (Forbes 15). 



1862. C. websteri Brongniart (Heer & Pengelly 22). 

 1 8G2 $ ? F. parisiensis Brongniart. 



' (. ? F. thalictroides var. Brongniart (Bristow 21). 



1863. C. websteri Brongniart (Heer 23). 

 1874. C. ivebsteri Brongniart (Schimper 26). 



1887. 0. (F.) ivebsteri Brongniart (Starkie Gardner 29). 



1889. { £ tt£™£*^. I (Bristow-Strahan-Beid 31). 



C. websteri Brongniart 

 1893. F. kaltennordheimeiisis Zenker (Potonie 48). 

 1893. F. websteri Brongniart (C. Reid in Nehring 44). 



1893. C. thalictroides var. ivebsteri Brongniart (Nehring 44). 



1894. F. ivebsteri Brongniart pro var. Potonie (Potonie 50). 

 1897-99. Stratiotes websteri (Potonie 58). 



1901. Stratiotites ivebsteri Brongniart (Zinndorf 60). 

 1905. ? S. ivebsteri Potonie (Eugene Dubois 61). 

 1908. ? S. websteri Potonie (Engelhardt & Kinkelin 65). 

 1910. S. ivebsteri Brongniart (C. & E. M. Reid 68). 

 1920. 8. laUennordheimensis Zenker (E. M. Reid 71). 



' ? F. kaltennordheimensis var. minima 

 Stratiotes ivebsteri 



Stratiotites websteri J 



1920. ^ "" "' ""» '™ e ' " ^ (Menzel 72). 



j V. ivebsteri 



Seed oblong, almost cylindrical, but slightly flattened laterally, 

 either somewhat sigmoidal or hooked ; keel narrow, often beaked 

 at the apex, frequently convex exteriorly, not continued round the 

 base, merging into the collar gradually ; collar large, rounded ; 

 testa thick, wood} r , ornamented with longitudinal ridges which 

 run from neck to apex, where they end in the beak if it be present; 

 pitting rather fine on body, collar, and keel, very fine along the 

 dorsal edge of the keel ; dorsal wall broadening greatly towards 

 the apex ; micropyle basal or sub-basal, very slightly oblique ; 

 hilum dorsal, variable in position: it may occur at any point on the 

 dorsal margin between the middle and the apex, when apical it is 

 almost invariably associated^with a beak (sigmoidal seed), other- 

 wise the beak is absent or but feebly developed (hooked seed) ; 

 raphe short : when associated with a mid-dorsal hilum it is marginal 

 to the apex, and then transverse, for other positions of the hilum 

 the raphe is transverse, either obliquely or directly ; digitate cells 

 of the interior of the keel straight, parallel to the length of the 

 keel. 



Dimensions. — Length=7*5 mm. ; breadth =3 mm. (largest). 

 Length=5-25 mm.; breadth =2*25 mm. (smallest). 



Horizon. — Middle Oligocene (where the horizon is definitely 

 known). ? Upper Oligocene. 



Localities. — Upper Middle Oligocene, Susswasserschicht of 

 the Cyrena Marls. Offenbach-am-Main ; Hamstead Beds of Ham- 

 stead and Bouldnor Cliff, Yarmouth (Isle of Wight); lignite of 

 Bovey Tracey (Devon). 



