OTOZAMITES. 61 



figured in PL I. Fig. 3 must certainly be referred to Bunker's 

 species ; the pinnae agree closely with that figured by Schenk, 

 and with the inferior figure by Dunker. We have a pinnate 

 frond, with segments attached by an auriculate base ; the venation 

 agrees with that of Otozamites, and the general character of the 

 leaf points to that genus as the most convenient designation for 

 the specimens. Another specimen, PI. II. Fig. 4, possesses 

 pinna? of the same form as those in V. 2236, but differs in its 

 much stouter rachis and in the imbricate disposition of the 

 segments. It is difficult to speak confidently as to the relation 

 of the several specimens one to another, but probably we have 

 in PL II. Fig. 4 the lower portion of a young frond of the same 

 form of which PL I. Fig. 3 represents a terminal fragment. 

 Leaving a more detailed notice of these specimens until later, 

 we must turn to the extremely fine examples of the larger 

 fronds, such as those represented in PL VII. Fig. 9, etc. It is 

 possible there may be two or three species represented by this 

 splendid series of fronds, which I have referred to the genus 

 Otozamites ; in some the pinna? are longer and narrower than 

 in others, and in some we have a shorter and broader form of 

 segment. On the whole, in the absence of any constant and 

 well-marked differences consistent with separate species, I prefer 

 to include nearly all these various forms under one species, 

 Otozamites Klipsteinii (Dunk.), and resort to descriptive terms 

 for the designation of one or two varieties. We may thus 

 define this comprehensive species : Frond pinnate, rachis fairly 

 stout, tapering to a slender axis in the terminal portion ; pinnae 

 attached to the upper surface of the rachis, in the young frond 

 probably imbricate, with a more or less well-marked auriculate 

 base ; veins numerous, radiating from the point of attachment 

 towards the margin of the pinnae ; apices obtuse, pinnae alternate 

 or subopposite, in the mature fronds almost at right angles to 

 the axis, or more or less obliquely inclined. 



Before describing the individual specimens referred to this 

 species and its varieties, we may notice some other forms of the 

 genus Otozamites, and other plants with which the present example 

 may be compared. Otozamites Beanii (L. and H.) * corresponds 



1 Fossil Flora, pi. xliv. 



