4 H OLDEN, Abnormal Spike of Ophioglossuin viilgatuvi. 



average, but apart from this there was nothing abnormal in 

 its appearance : the fertile region, however, exhibited very 

 considerable abnormality and complexity {Text-fig. II. 

 A, B). 



A. B. C. 



F?g. II. 



A. Enlarged drawing of an abnormal spike S,, S.^ Main Serie<;, 



S3, S4 Accessory Series. 



B. Semi-diagrammatic diawing from opposite point of view to A. 



C. Slightly abnormal specimen showing rotation of sporangia. 



The main structure consisted of two series of sporangia, 

 coiled spirally round the axis, these separating near the 

 apex of the axis, and developing in that region the double 

 row of sporangia characterising the normal Ophioglossum 

 "spike" {Text fig, \\. A,B\ s„ s,). 



In addition to these the sporangiophore bore basally 

 and laterally, a small and apparently independent fertile 

 portion, exhibiting the normal structure, and a similar 

 but less completely independent one, near the point at 

 which the two main series diverged. (^Textfig. 11. A, B; 



