SPHENOZAMITBS. 117 



to determine ■with confidence. These fragments, which were 

 obtained from the Inferior Oolite of Bamack and Wansford, in 

 Northamptonshire, are perhaps best described as Otozamites, sp., 

 and may be identical with the Yorkshire type of frond described as 

 0. oitusus, var. ooliticus.^ 



The Jermyn Street Museum contains a specimen of Otozamites 

 from the Inferior Oolite of Stamford (a locality on the borders of 

 Lincolnshire and close to Bamack and Wansford), bearing the 

 name Otozamites graphicus, a species recorded by Professor Judd* 

 from the Lincolnshire Oolite of Stibbington. The Stamford 

 specimen may be specifically identical with those in the British 

 Museum, but it is impossible ia the absence of better specimens to 

 determine its exact position. 



V. 4641, V. 4660, Pieces of Otozamites fronds. 



Sheep pit near "Wansford (Inferior Oolite). C. W. Peach Coll. 



V. 6585. An obscure impression, 17 cm. long ; pinnas contiguous, 

 with auriculate upper basal edge. 

 Stonesfield Slate. 



51,129. A similar specimen from Bamack. Morris Coll. 



V. 5274, v. 6588. Obscm-e impressions ; locality unknown. 



Genus SPHENOZAMITBS, Brongniart. 



[Tableau, p. 61, 1849.] 



Brongniart proposed the name Sphenozamites as a sectional 

 designation for Cycadean fronds included under Otozamites and 

 characterised by the presence of divergent veins and by the 

 absence of an auriculate base; he suggested that the name 

 might eventually be raised to generic rank. Zigno made use of 

 Brongniart's genus in his Oolitic Flora, and instituted the species 

 Sphenozamites Rossii for a pinnate frond with broad wedge-shaped 

 pinnse traversed by spreading veins, and vrithout the auriculate 



> Seward (00), p. 218, pi. i. fig. 1 ; pi. u. fig. 2. 

 2 Judd (75), p. 174. 



