GEOLOGICAL SUEVEY OF THE TEEEITOEIES. 425 



Sassapeas Harkeriana, sp. nov. 



Leaves proportionally small, thick, coriaceous, cuueiform, or narrowed 

 to the petiole, round-truncate from above the middle, three-lobed, with 

 obtusely-pointed, very short lobes, and undulate-dentate borders be- 

 tween them. 



The leaves are thicker and larger than in S. oMusus, 9 cent, broad and 

 as long, three-nerved from above the base, deeply veined ; the secondary 

 veins camptodrome, except a few, which pass into short teeth between 

 the lobes. 



LAUEOPHYLLUM RETICULATXJjM, sp. 710V. 



Leaves long, linear-lanceolate, thick, coriaceous, entire, tapering to a 

 thick, short petiole ; medial vein broad, secondary veins open, numerous, 

 anastomosing in an irregular reticulation from above the base ; campto- 

 drome. 



These leaves resemble those of some species of Laurus by their form, 

 their texture, and the thick medial nerve ; the nervation, however, is 

 of a different type. The secondary veins numerous, close to each other 

 at unequal distance, often intermixed with shorter veins, curve and 

 anastomose from near the base in irregularly polygonal small meshes, 

 ascending with their ramifications to the borders, and curving along 

 them. Professor Heer has in his Flora of Moletin a species Myrtophyl- 

 lum Geinitzi, which has the same form of leaves, but adifferentnervation, 

 the upper end of the veins following the borders and uniting as a kind 

 of marginal veinlet. This character is not remarked in our leaves, of 

 which I have many specimens with distinct nervation. ' 



It is remarkable, that this Cretaceous Flora of Moletin, which is 

 known as yet by eighteen species, has one Aralia, one Credneria, one 

 Gleichenia, and one Sequoia, or four species, which are, if not identical, 

 at least intimately related to species of our Cretaceous. 



AU the specimens of this species are from Fort Harker. 



Platanus Herii, Lsqx., Eept. 1871, p. 303. 



Beside the form, whose characters have been described, there is from 

 Salina a leaf preserved entire, which differs by more acute lobes and its 

 api^arently membranaceous consistence. 



Pterospeeimites quadratus, Lsqx., Eept. 1871, p. 301. 



A number of specimens from Fort Harker, varying in size, confirm 

 the description of this fine species. The undulations of the leaves ap- 

 pear more generally as short, distant teeth, entered by the point of the 

 secondary veins and their divisions. 



Pterospermites Steenbergii, sp. nov. 



Leaves large, thick, coriaceous, ovate, tapering into an obtuse point, 

 round cordate at base ; borders entire, or slightly undulate. 



A splendid leaf, 23 cent, long, 20 cent, broad, deeply pinuately nerved; 

 secondary veins more open than in the former species, with two or three 

 pairs of simple, smaller basilar veiulets, inclined downward, or at right 

 angle from the medial nerve ; the other 10 to 11 pairs above are parallel, 

 the lowest branching twice, the upper ones simple, all craspedodrome. 



