DESCRIPTION OF THE SPECIES. 319 



Locality: 72d mile-post, near Brooke; very rare. 



In Fig. 9, in the right-hand upper portion of the fragment, at («), we 

 ha\e apparently a portion of the original sinus and margin.s of the lobes 

 preserved, as well as a part of the right lateral main lobe. This shows 

 that the leaf must have been quite large. In Fig. 10, at («), in the right- 

 hand basal portion of the leaf, we have apparently a portion of the original 

 basal margin, indicating that the lower part of the leaves was shaped like 

 that portion of the preceding species. 



Arali.ephyllum aceroides, sp. nov. 



Plate CLVI, Fig. 11 ; Plato CLXII, Fig. ->. 



Leaf large, approximately fan-shaped, cut pretty deeply into three 

 large lobes, the lateral ones about half-way down to the base cut on the 

 outer margin into a shallow, acute, tooth-like lobe, sinnlar to those of 

 Liriodcndroii; the middle and largest lobe not preserved, but apparently 

 shaped like that of the other species of the genus — that is, it was broadly 

 elliptical and flared out in the middle, being narrowed to the base and 

 summit ; separated from the main lateral lobes by a sinus that is turned 

 slightl}- outwards and is broadest at the bottom ; the main lateral lobes 

 above the tooth-like lobe inequilateral, slightly convex on the u[)per mar- 

 gin, with the lower one very convex, turned upwards, and ending in a sub- 

 acute tip; three principal strong nerves diverge from the base of the leaf, 

 one going into eacli principal lobe, the middle one being the strongest; the 

 two outer lateral primaries send off on their lower side, some distance from 

 and at the same height aljove their divergence, a strong branch that curves 

 upwards to enter the lateral tooth-like lobe ; the primaries send off at 

 points higher smaller branches nearly at right angles, which curve upward.s 

 and branch. The lateral primaries send off on the outer side the largest 

 brandies. 



Locality: 72d mile-post, near IJrooke; very rare. 



This splendid leaf differs in some respects from the previously 

 described species of AraJiuphtjUum, more especiall}- in the peculiar shape 

 and smaller size of the subordinate lateral lobe, but it is so close to them 

 in essential points that it cannot be separated and placed in a distinct 



