SPHENOZAMITES. 119 



Sphenozamites Belli, sp. nov. 



(PI. XI. Fig. 4 ; Text-fig. 12.) 



1845. ? Naiadea obtusa, Buckman, Geol. Cheltenham, p. 67, pi. i. fig. 2. 



1854. N. obtusa, Morris, Brit. Foss. p. 12. 



1871. N. obtusa, Phillips, Geol. Oxford, p. 169. 



1894. N. obtusa. Woodward, Lower Ool. p. 598. 



Type-specimea (Test-fig. 12) formerly in the collection of 

 A. M. BeU, Esq., and recently presented by him to the Oxford 

 Museum. From Stonesfield. 



The species is founded on detached pinnse characterised by their 

 wedge-shaped lamina, which tapers gradually to a comparatively 

 acute apex, one edge of the lamina being more strongly arched 

 than the other; the pinnae are contracted at the proximal end, 

 and were probably attached by a narrow base to the rachis. 

 Veins numerous, dichotomously branched, spreading from the 

 base through the substance of the lamina. 



The leaflet figured by Buckman as Naiadea oltusa is probably 

 specifically identical with Mr. Bell's specimen, but as I have not 

 been able to identify the original of the crude drawing published 

 in the Geology of Cheltenham it seemed wiser to institute a new 

 name. I have therefore named the species after Mr. Bell, whose 

 collection of fossils has afforded me much assistance in the 

 investigation of the Stonesfield flora. Sphenozamites Belli may 

 be compared with species from Italian Jurassic beds referred by 

 Zigno ' to the same genus, and with S. rohiistus, Newb.,'* from the 

 Ehsetio of Honduras. 



Text-fig. 12. (Specimen in the Oxford Museum.) 

 A single pinna, 9 cm. long and rather more than 4 cm. wide in 

 the broadest part ; the veins are numerous and spreading, differing 

 both in their more divergent course and in their greater number 

 from those of Podozamites. 



V. 4069. PI. XI. Fig. 4. 



A single pinna 8 cm. long. The asymmetrical form of the lamina, 

 the course and greater number of the veins, are characters by which 



' Zigno (81), pis. xxxix.-xl. 



2 Newberry (88), p. 347, pi. viii. fig. 14. 



