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EXPLANATION OP PLATES XXX & XXXI. 



[The drawings are by Miss G. M. Woodward. All the specimens figured, 

 except PL XXXI, fig. 5, are in the Geological Department of the British 

 Museum (Natural History).] 



Plate XXX. 



Fig. 1. Sporangium-like organs of Glossopteris Browniana, Brongn. Detached 

 sao-like bodies : the larger specimen shows what was probably the 

 apex (a) of the organ, at which point dehiscence appears to have 

 begun. In the smaller, the dehiscence is well marked, but the 

 specimen is more fragmentary. X 35. Reg. No. V. 7202. 



2. A nearly-perfect specimen of one of the detached sporangium-like 



organs, showing the apex (a), at which the sac appears to have 

 opened, and the contents to be exposed. A small portion of the 

 neck (b) is also seen. The cell-walls of the outer limiting-layer of 

 the sac are very conspicuous. X 30. Reg. No. V. 7211. 



3. A group of four detached bodies, arranged in a sorus-like manner. 



In specimen x, the neck-like extremity, by which the sporangium was 

 probably attached, is indicated. In specimen y the sac appears to 

 have dehisced, and the inner concave surface is seen, the cell-walls 

 of which are much less conspicuous than those of the outer. X 30. 

 Reg. No. V. 7202. 



4. A fragment of a scale-frond of Glossopteris Browniana, showing the 



inner, strongly-concave surface. The nervation is preserved, although 

 somewhat faintly. At the lower portion of the figure (d), a confused 

 mass of the sporangium-like bodies occurs, resting on the scale-leaf. 

 Higher up may be seen a row of oval scars or prints (a, b, e), possibly 

 the points of attachment of sori. The scars, b and c, are well defined, 

 and here fragments of the sac-like bodies appear to be still in con- 

 tinuity. At e, some of these sac-like bodies are better preserved, but 

 it cannot be determined whether they are attached to the scale- 

 frond, x 15. Reg. No. V. 7202. 



Plate XXXI. 



[Figs. 1-4 : Sporangium-like organs of Glossopteris. Fig. 5 : A micro- 

 sporangium of Stangeria paradoxa.j 



Fig. 1. Three of the sac-like organs, which appear to have dehisced : the inner, 

 concave surface being seen. The cell-walls of the inner limiting- 

 layer are much less conspicuous than those of the outer. X 30. 

 Reg. No. 39,149. 



