PLATE 68. 
Fig. 1. 314. 1. SPHENOTHALLUS ANGUSTIFOLIUS. (Pag. 261.) 
Fig. 2. 315. 2. SPHENOTHALLUS LATIFOLIUS. (Pag. 262.) 
2a. A leat nearly entire, showing a depressed line along the centre. 
26. A similar leaf, with a sharp ridge along the centre. 
2c. A leaf of a narrower and more elongated form, with a broad ridge along the centre. , 
2d. Another fragment, with a ridge extending a part of the length. 
2, f. Fragments of what may have been stems of this plant. 
Fig. 3. 316. 4. BuTuoTrEPHIs sUBNODOSA. (Pag. 262.) 
3 a, b. Figures of imperfect specimens, illustrating the prevailing form of the species. 
