3r> 



others rcfcncil by llccr lo Jniii/'cnis, Liboccdnts, Frcnclopsis, 

 Thuya and Datiunara. Of these tlic most abundant and most 

 interesting are .]foricoiiia cyclotoxon — the most beautiful of eoni- 

 fers — and Cuuniiii^liainitcs clci^aiis, botli of which occur in the 

 Cretaceous clays of Aachen, Prussia, ami I'atoot, Greenland. The 

 liracliyphylhiin was a large and strong species with imbricated 

 cones eight inches in length. 



The angiosperms form about seventy species, which include 

 three o{ Magnolia, four of Liriodendron, three or four of Salix, 

 three of CclastropJiylhiin (of which one is identical with a Green- 

 land species), one Cclastrus (also found in Greenland), four or five 

 Aralias, two Sassafras, one Cinuaiiionnnn, one Hcdcra, with 

 leaves that are apparently identical with those described by Heer 

 as \iQ\o\\^\xi^\.o Andromeda, Cissitcs, Corftns, Dewalquca, Diospyros, 

 Eucalyptus, Ficiis, Ilex, Juglans, Laurus, Menispcrmites, Myrica, 

 Myrsine, Prnnns, Rhaviiuis, and others not yet determined. 



Some of the Aralias had palmately lobed leaves nearly a foot 

 in diameter — and two of the tulip trees (Liriodendron) had leaves 

 quite as large as those of the living species. Oneof these had deeply 

 lobed leaves like those of the white oak. Of the other the leaves 

 resembled tliose of the recent tulip tree, but were larger. Both 

 had the peculiar emargination and the nervation of Liriodendron. 



Among the most interesting plants of the collection are fine 

 species of Bauhinia and Hyniencca. Of these the first is repre- 

 sented by a large number of leaves, some of which are six or 

 seven inches in diameter. They are deeply bilobed and have the 

 peculiar and characteristic form and nervation of the leaves of 

 this genus. Bauhinia is a leguminous genus allied to Cercis, and 

 now inhabits tropical and warm temperate climates in both hem- 

 ispheres. Only one species occurs in the United States, Jnxuhinia 

 lunarioides, Gray, found by Dr. Bigelow on the Rio Grande. 



Hymencea is another of the leguminosa; and inhabits tropical 

 America. A species of this genus has been founti in the Upper 

 Cretaceous of France, but quite different from the one before us, 

 in which the leaves are much larger, and the leaflets are united 

 in a common petiole, which is winged ; this is a modification not 

 found in the living species, and one which brings it nearer to 

 Baiihi7iia. 



