102 



C O N T R I B U T I O N S TO PAL^ONTOLOGY 



The use of modern correlatives in attempting to determine the climatic require- 

 ments of the Lance species is indicated in table 2. The modern genera or famihes 

 which are considered most closely related to the Lance species are hsted with their 

 modern distribution, so far as it is determinable. Fossil species whose modern re- 

 lationships are unknown or in doubt have been omitted ; in the case of species which 

 show an equally close relationship to two modern genera, both genera are hsted. It 



Table 2 



Fossil species 



Modern correlatives 



Modern distribution 



Cool 

 temp. 



Warm 

 temp. 



Sub- 

 tropical 



Tropical 



AraliiBphyllum artocaipoides 

 Araucarites longifolia 

 Aristolochites brittoni 

 Canna? magnifolia 



Cercidipliyllum arcticum 

 Cercidipliyllum elliptii-um 

 Cornophyliinn wardii 

 Dillenites cleburni 

 Dombeyopsis colgatensis 

 Dombej-opsis oljtusa 

 Dombeyopsis trivialis 

 Dryophyllum subfalcatum 



Equisetum sp. 

 Ficus planico.stata 

 Fraxinus leii 

 GinkKo adiantoides? 

 Grewiopsis saiKjrtana 



Laurophyllum coloradensis 

 Laurophyllum meeki 

 Lauropliyllum salicifolium 

 Lauropliyllum wardiana 

 MaKnoliophyllum cordatum 

 Menispermites belli 

 Menispeiniites cockerelli 

 Menispermites knightii 

 Myrtophyllum torreyi 

 Nelumbo tenuifolia 

 Nympha'ites browni 

 Nympha;ites dawsoni 

 Pistacia eriensis 

 Pistia corruKata 

 Platanophyllum montanum 

 Platanophyllum platanoides 

 Quercophyllum gardneri 

 Sabalites eocenica 

 Sabalites montana 

 Sali.x lancensis 

 Sequoia dakotensis 

 Typha sp. 



Viburnum marginatum 

 Viburnura montanum 

 Vitis stantoni 



Araliacese 



Araucaria 



Aristolochaceae 



Canna 



Thalia 



Cercidiphyllum .... 

 Cercidiphyllura .... 



Cornus 



Dilleniacese 



Menispermacese. . . . 

 Menispermace». . . . 

 Cocculus (Cebatha) . 



Quercus 



Castanea 



Equisetum 



Ficus 



Fraxinus 



Ginkgo 



Grewiopsis 



Callichlamys 



Lauracea; 



Laurace» 



Lauracea; 



Lauracea; 



Magnoliaceae 



Menispermacese. . . . 

 Menispermaceai. . . . 

 Menispermaceae. . . . 



Myrtace» 



Nelumbo 



Nynipha;acese 



NyniphieacetE 



Pistacia 



Pistia 



Platanacese 



Platanacea; 



Quercus 



Sabalese 



SabalesB 



Salix 



Sequoia 



Typha 



Viburnum 



Viburnum 



Vitis 



Totals . 



X 

 X 

 X 

 X 

 X 

 X 



29 



X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 



42 



X 

 X 

 X 



40 



28 



