DESCRIPTION. OF SPI<;CIES. 161 



CissiTES for:hosus Heer. 

 PI. XXI, Fig. 5. 



Fl. Fobs. Arct., vol. 6, Abth. 2, p. 85, PI. xxi, Figs. 5-8. 



Leaves palmately, deeply trilobate, entire; median lobe contracted in 

 the middle, trilobate; lobes obtuse. 



This is the description of Heer, who had seen only small fragments of 

 this species, but has reconstructed a fine, whole leaf according to the char- 

 acters of the fragments. The part we have now is far better preserved than 

 any of those figured by Heer. The median nerve is thick, with two pri- 

 mary, opposite, lateral, supra-basilar nerves, one of which is forked quite 

 near its base, and the lobe is accordingly bilobate; the other is simple, 

 undivided, and the lobe entire. The upper lobe is enlarged and evidently 

 divided into three small lobes on each side; at least it has three pairs of thin 

 secondary nerves, which ascend obliquely, but straight, one of them reach- 

 ing the point of a small lobe or round tooth. Exeejjt these three pairs of 

 .secondaries in the upper part of the leaf there is no nervation marked above 

 or below the primaries. On the contrary, in Heer's specimen the second- 

 aries appear much lower, as low as the sinuses, and in ascending form 

 apparently successive lobes on the side of the upper division, which is thus 

 more elongated than it could be in our leaf, which difters also bv liaving 

 the lateral loljes less oblique, nearly at right angles to the median nerve, 

 and the sinuses broader. 



Habitat: Ellsworth County, Kansas. No. 9 of the museum of the 

 University of Kansas. Collected by A. Wellington. 



CiSSITES OBTUSILOBUS, Sp. nOV.' 



PI. XXXIir, Fig. 5. 



Leaf small, thickish, fan-shaped or semilunar, rounded to a long petiole, 

 abruptly decurring to it at its very base, subtruncate and obtusely shoi't- 

 lobate or rather undulate at apex, palmately trinerved from above the base, 

 with two pairs of secondary nerves parallel; craspedodrome. 



The leaf has a close affinity of characters with C. harkerianus Lesq! 

 (Cret. and Tert. FL, p. 67, PI. in. Figs. 3, 4). It might possibly be consid- 

 ered a form allied to C. Heerii Lesq. (Cret. and Tert. FL, p. 68, PL v. Fig. 2). 



'Prof. Lesquerenx wrote later of this species as follows : " Velenovsky iu his Flura bohm. Kreide- 

 fomiation, pt. 'I, PI. vi. Fig. '2, has a ligure like this {Ciseites ohtiiailohus, .sp. nov., PI. xxxm, Fig. ^), 

 and has named it Liriodendron Celakovikii ; it essentially difl'ers by the lateral primaries being bas- 

 ilar."— F. H. K. 



MON XVII 11 



